1.1 This terminology covers those terms recommended by the International Union of Pure and Applied Chemistry (IUPAC),2 and is intended to provide guidance in the use of ion-selective electrodes for analytical measurement of species in water, wastewater, and brines.1.2 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

定价： 590元 / 折扣价： 502 元 加购物车

Scaffolds may be composed of purely mineral or ceramic materials, or they may be composed of a composite material with its main phase being a mineral or ceramic. Scaffolds may be porous or non-porous, mechanically rigid or compliant, and degradable or non-degradable. The scaffold may or may not have undergone a surface treatment.1.1 This guidance document covers the chemical, physical, biological, and mechanical characterization requirements for biocompatible mineral- and ceramic-based scaffolds used solely as device or to manufacture tissue-engineered medical products (TEMPs). In this guide, the pure device or the TEMPs product will be referred to as scaffold.1.2 The test methods contained herein provide guidance on the characterization of the bulk physical, chemical, mechanical, and surface properties of a scaffold construct. These properties may be important for the performance of the scaffold, especially if they affect cell behavior, adhesion, proliferation and differentiation. In addition, these properties may affect the delivery of bioactive agents, the biocompatibility and the bioactivity of the final product.1.3 This document may be used as guidance in the selection of test methods for the comprehensive characterization of a raw materials, granules, pre-shaped blocks, or an original equipment manufacture (OEM) specification. This guide may also be used to characterize the scaffold component of a finished medical product.1.4 While a variety of materials can be used to manufacture such scaffolds, the composition of the final scaffold shall contain mineral or ceramic components as its main ingredients.1.5 This guide assumes that the scaffold is homogeneous in nature. Chemical or physical inhomogeneity or mechanical anisotropy of the scaffold shall be declared in the manufacturer’s material and scaffold specification.1.6 This guide addresses neither the biocompatibility of the scaffold, nor the characterization or release profiles of any biomolecules, cells, drugs, or bioactive agents that are used in combination with the scaffold.1.7 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.1.8 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

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1.1 This specification establishes requirements for the material properties and physical properties, including dimensional tolerances, extrusion quality, and weatherability, of rigid poly (vinyl chloride) (PVC) exterior profiles used for sound walls. Methods for testing and for identifying exterior profile extrusions that comply with this specification are also provided. In addition, requirements for flexural capacity are given.NOTE 1: Information with regard to application, assembly, and installation should be obtained from the manufacturer.1.2 The material used in these exterior profiles is limited to rigid poly (vinyl chloride) (PVC) compounds in a single homogeneous extrusion or in a coextrusion of two or more PVC compounds in distinct layers.1.3 Units—The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

定价： 590元 / 折扣价： 502 元 加购物车

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定价： 590元 / 折扣价： 502 元 加购物车

5.1 Some fuel dilution of the engine oil may take place during normal operation. However, excessive fuel dilution is of concern in terms of possible performance problems.1.1 This test method covers determination of the amount of dilution in crankcase oils of engines when gasoline has been used as the fuel.NOTE 1: There may be cases in dispute, therefore, the user of this test method is advised to establish whether this method will be accepted. There may be cases where Test Method D3525 results will be set as the referee value.1.2 The values stated in acceptable SI units are to be regarded as the standard.1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. For specific precautionary statement, see 6.4, 7.1, and 9.3.

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4.1 The purpose of this specification is to establish a recognized standard of quality for rigid poly vinyl chloride (PVC) exterior profiles for use in assembling agricultural, commercial, and residential fencing and railing. The term “PVC fence” refers to complete fencing and railings systems in which the primary structural members such as posts, rails, spindles, pickets, and gates are made from PVC exterior profiles. Accessory components (not included in this specification), including bolts, screws, hinges, latches, caps, and brackets, may be made from PVC or non-PVC materials, or both. The information contained in this specification is intended to be helpful to producers, distributors, and users and to promote understanding between purchasers and sellers.AbstractThis specification deals with rigid poly vinyl-chloride (PVC) exterior profiles used for agricultural, commercial, residential fencing and railing. The material used in these exterior profiles is limited to rigid poly (vinyl chloride) (PVC) compounds in a single homogeneous extrusion or in a coextrusion of two or more PVC compounds in distinct layers. Loadbearing characteristics for fence and railing assemblies are not addressed within this specification (for example, windload, horizontal or vertical guardrail loading). Materials shall be tested and shall conform to requirements for the material properties and physical properties, including dimensional tolerances, extrusion quality, and weatherability. Methods for testing and for identifying exterior profile extrusions, such as impact resistance, warp, dimensional stability, and impact test on weathered specimen that comply with this specification are also provided.1.1 This specification establishes requirements for the material properties and physical properties, including dimensional tolerances, extrusion quality, and weatherability, of rigid poly vinyl-chloride (PVC) exterior profiles used for agricultural, commercial, residential fencing and railing. Methods for testing and for identifying exterior profile extrusions that comply with this specification are also provided.NOTE 1: Information with regard to application, assembly, and installation should be obtained from the manufacturer or in accordance with Practice F1999, or both.NOTE 2: Loadbearing characteristics for fence and railing assemblies are not addressed within this specification (for example, windload, horizontal or vertical guardrail loading).1.2 The material used in these exterior profiles is limited to rigid poly (vinyl chloride) (PVC) compounds in a single homogeneous extrusion or in a coextrusion of two or more PVC compounds in distinct layers.1.3 The values stated in inch-pound units are to be regarded as the standard. The values in parentheses are provided for information only.1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

定价： 590元 / 折扣价： 502 元 加购物车

定价： 515元 / 折扣价： 438 元 加购物车

4.1 Measures obtained by a response-type system depend primarily on the vehicle design and condition, the load, the measuring speed, and a host of environmental conditions. Even with control of all significant variables, the response of every vehicle is unique. Thus, raw measures from such a system are not reproducible with other systems.4.2 The calibration described in this practice provides a method for converting the raw output of a particular response-type system to a reproducible standard roughness scale.4.2.1 The response of a vehicle to road roughness is a complex phenomenon that cannot be summarized in a laboratory test. Therefore, the calibration is made through correlation with standard roughness index values established for calibration sites situated on representative roads. The data from the calibration sites are analyzed to determine an equation to estimate the standard roughness index from an RTSN.4.3 The estimate of the standard roughness index made by transforming an RTSN is subject to three types of error:4.3.1 Random Error of the Response-Type System (Repeatability)—This error includes operator error and variability in the response of the vehicle and other components of the response-type system. It can be reduced by performing repeated measurements with the response-type system and averaging the individual measurements to estimate the true RTSN for a site. Appendix X1 describes a test method for determining the magnitude of in-use repeatability error.NOTE 1: The length of the site or sites used to estimate in-use repeatability shall be equal to the minimum length of the test sections to be surveyed by the response-type system. This may require test sites that are longer than those profiled for the calibration.4.3.2 Bias Error in the Calibration Equation—Estimates of the standard roughness index are biased if the calibration equation is incorrect or if no calibration equation is used. The purpose of this standard practice is to reduce bias to a negligible level. If desired, the magnitude of bias remaining after calibration can be estimated from data collected in the calibration.4.3.3 Standard Error of the Estimate (Error Due to Interactions Between Site Effects and Response-Type System Effects)—This error is constant (a bias) for a particular combination of response-type system and site, but it is random with site selection. Ultimately it limits the accuracy of the estimate of the standard roughness of a site made with a response-type system. The error can be estimated from data collected in the calibration.4.3.3.1 The standard error of the estimate estimates the error due to physical differences in response between a particular response-type system and the standard roughness index. It cannot be reduced by a mathematical transform.4.3.3.2 Three physical variables that are controllable and that influence the standard error of the estimate are vehicle test speed, shock absorber damping stiffness, and vehicle tire pressure. For most vehicles, maximum reproducibility of standard roughness index estimates is obtained by adopting a test speed of 80 km/h [50 mph], by equipping the vehicle with stiff shock absorbers, and by maintaining a standard tire pressure. (See also 8.2.)4.4 Periodic verification is essential to ensure that the calibration remains valid.1.1 This practice describes equipment and procedures for the calibration of systems used for measuring vehicular response to pavement roughness. Such systems are referred to as response-type systems. (See Test Method E1082.)1.2 The response-type system includes the driven vehicle, the driver and contents of the vehicle, the towed trailer (if one is used with the system), and a device called a road meter that measures the vehicle response to pavement roughness. The road meter may be mounted in an automobile, van, or in a towed trailer. Response-type (road meter) devices covered in this practice include: devices measuring the relative axle-body motion of a vehicle, devices measuring the vertical acceleration of the vehicle body, and devices measuring the vertical acceleration of the vehicle axle.1.3 The calibration procedures described in this practice are limited to the use of the simulations described in Practice E1170.1.4 This practice is not intended to apply to pavement roughness measuring equipment whose output is not influenced by the response of the host vehicle.1.5 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in nonconformance with the standard.1.6 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.1.7 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

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5.1 The purpose of this practice is to provide designers, engineers, manufactures, owners, and operators with criteria and references for use in designing, inspecting, and operating patron transportation conveyor systems which are integral with a water related ride or device.1.1 This practice applies to the classification, design, manufacture, construction, and operation of patron transportation conveyors, integral with the operation of water related amusement rides or devices as scoped in Practice F2376-21a.1.2 This practice applies to conveyors used for patron loading/unloading or to transport patrons on rafts, tubes, or other vehicles. Loading, sequencing, transitioning, starting, and unloading conveyors that carry patrons are included in the scope of this practice.1.3 This practice shall affect new conveying systems or major modifications of conveyors used in an amusement ride or attraction.1.4 This practice includes an appendix (non-mandatory), which provides additional information (for example, rationale, background, interpretations, drawings, commentary, and so forth) to improve the user’s understanding and application of the criteria presented in this practice. The appendix information shall not be interpreted as mandatory design criteria.1.5 Units—The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.1.6 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.1.7 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

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This specification covers aluminum-base and zinc-base master alloys used to make zinc die-casting alloys. The material may be made by any suitable process. The material covered by this specification shall be of uniform quality and shall be free of dross, flux, or other harmful contamination. If the material is in shot form, it shall be sound, uniform size, and free of a heavily oxidized surface coating, stringers, and moisture. Aluminum-base master alloys (hardeners) shall be tested and conform to the required chemical composition for aluminum, copper, iron, silicon, manganese, magnesium, zinc, chromium, nickel, tin, lead, and cadmium. Zinc-base master alloys shall conform to the color code requirements and to the required alloy composition for aluminum, magnesium, iron, copper, lead, cadmium, tin, and zinc. The weight of jumbo ingots shall conform to the required weight limits. 1.1 This specification covers aluminum-base and zinc-base master alloys used to make zinc die-casting alloys. Alloy compositions specified for aluminum-base master alloys (hardeners) are designated as shown in Table 1. Alloy compositions specified for the zinc-base master alloys are designated as shown in Table 2. 1.2 Aluminum alloy hardeners are added to Special High Grade zinc (per Specification B6) in the proper alloying ratios, as shown in Table 1, to produce zinc alloys for die casting. 1.3 Zinc-base master alloy is added to Special High Grade zinc (per Specification B6) in the proper alloying ratio, as shown in Table 3, to produce zinc alloy for die casting. 1.4 Master alloys may be supplied in the form of shot, bar, ingot, or jumbo ingot as specified by the purchaser. Specification B897 covers configuration of jumbo, block, half block, and slab ingot. 1.5 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard. 1.6 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to become familiar with all hazards including those identified in the appropriate Safety Data Sheet (SDS) for this product/material as provided by the manufacturer, to establish appropriate safety, health, and environmental practices, and determine the applicability of regulatory limitations prior to use. 1.7 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

定价： 515元 / 折扣价： 438 元 加购物车

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定价： 515元 / 折扣价： 438 元 加购物车