定价： 605元 / 折扣价： 515 元

定价： 540元 / 折扣价： 459 元

定价： 0元 / 折扣价： 0 元

定价： 392元 / 折扣价： 334 元 加购物车

定价： 384元 / 折扣价： 327 元

定价： 124元 / 折扣价： 106 元 加购物车

定价： 260元 / 折扣价： 221 元 加购物车

定价： 345元 / 折扣价： 294 元 加购物车

定价： 156元 / 折扣价： 133 元 加购物车

This specification covers the materials, manufacturing practice, and corresponding test methods for wet-cast precast modular retaining wall units cast from first-purpose concrete with or without the inclusion of steel reinforcement. The precast units covered by this specification are machine-placed units intended for use in the construction of dry stacked modular retaining wall systems. First-purpose concrete used for the production of precast modular retaining wall units under this specification shall be ready-mixed or central-mixed concrete. Other materials covered by this specification include cementitious materials, aggregates, admixtures, steel reinforcement, and lifting devices.This specification also covers ordering information that the purchaser shall specify, physical properties (compressive strength, air content), sampling, frequency of tests, specimen preparation, inspection, certification, product marking, and workmanship, finish, and appearance.1.1 This specification covers wet-cast precast modular retaining wall units cast from first-purpose concrete with or without the inclusion of steel reinforcement. The precast units covered by this specification are machine-placed units intended for use in the construction of dry stacked modular retaining wall systems.1.2 The text of this standard references notes and footnotes that provide explanatory material. These notes and footnotes (excluding those in tables and figures) shall not be considered as requirements of the standard.1.3 Units—The values stated in either inch-pound units or SI units are to be regarded separately as standard. Within the text of the specification, the SI units are shown in brackets. The values stated in each system are not exact equivalents. Therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the 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

5.1 Use of this practice is intended to reduce occupational dermatitis caused by exposure to the wet metal removal environment.5.2 Complaints of dermatitis conditions are often associated with exposures to metal removal fluid.5.3 Implementation of this practice and incorporation of metal removal fluid management program has the potential to reduce complaints of occupational dermatitis. Elements of an effective program include: understanding dermatitis and associated causes; prevention of dermatitis and exposure to metal removal fluids; appropriate product selection; good management of additives, microorganisms, and fluids; appropriate additive (including antimicrobial pesticides) selection and additive control; appropriate tool design and assessment; and control of metal removal fluid exposures, including aerosols.1.1 This practice sets forth guidelines for reducing dermatitis caused by exposure to the wet metal removal environment. The scope of this practice does not include exposure to chemicals that enter the body through intact skin (cutaneous route), which has the potential to cause other toxic effects.1.2 This practice incorporates means and mechanisms to reduce dermal exposure to the wet metal removal environment and to control factors in the wet metal removal environment that have the potential to cause dermatitis.1.3 This practice focuses on employee exposure to the skin via contact and exposure to metal removal fluid (MRF).1.4 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.1.5 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.1.6 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

1.1 This specification establishes uniform labeling criteria and package requirements for wet mops for household and institutional use. This standard does not apply to dry mops (that is, dust mops).1.2 The values stated in inch-pound units are to be regarded as standard. No other units of measurement are included in this 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, health, and environmental practices and determine the applicability of regulatory requirements prior to use.1.4 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

5.1 Precision equipment and high pressure hydraulic machinery require filtered lubricants and fluids to prevent damage from the circulation of hard particulate contaminants. Three types of particulate contaminants are present in lubricants and hydraulic fluids: built in contaminants from the machinery assembly process, generated contaminants from equipment wear, and contaminants that enter from external sources. Water can also enter machinery lubrication and hydraulic systems through fill ports, defective seals, corroded heat exchangers, and reservoir breathers in the form of rain water, cleaning solutions, process water, metalworking fluids, coolants, and humid air.5.2 The ability of lubricants and hydraulic fluids to retain their filterability in the presence of moisture is critical for efficient and reliable machine performance. Normally, the pressure differential across a filter will increase gradually as it accumulates dirt, sludge, and wear debris. In order to prevent the filter from collapsing, bypass valves in the filter assembly open when the differential pressure gets too high. If a filter becomes blocked by additives that precipitate due to the presence of contaminating water, the bypass valve will open. This can lead to a machine shutdown or circulation of damaging particles throughout the machine.1.1 This test method covers determination of the wet filterability of lubricants and hydraulic fluids based upon mass flow rate measurements through a 0.8 µm membrane after ageing of the fluid in the presence of water. The procedure applies to lubricants and hydraulic fluids that are formulated with American Petroleum Institute (API) Group I, II, III, IV and certain V base stocks. Products formulated with water or base stocks that are heavier than water are out of scope.1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.1.4 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

This specification covers ozone-resistant thermoplastic elastomer insulation for electrical wires and cables operating continuously at specified conductor temperatures, within the specified voltage range, and under wet or dry conditions. The prescribed tests cannot be performed unless the insulation is formed around a conductor, but these are done solely to determine the insulation properties and not to test the conductor or completed cable. Each test sample should be subjected to ac and dc voltage withstand tests as well as insulation resistance tests and should comply with the required values for aging, heat distortion, electrical permittivity, increase in capacitance, stability factor, and accelerated water absorption.1.1 This specification covers an ozone-resistant insulating compound for electrical wire and cables 14 AWG and larger. This compound consists substantially of a thermoplastic elastomer.1.2 This type of insulation is suitable for continuous operation at conductor temperatures not exceeding 90 °C in dry locations and 75 °C in wet locations. Operating voltages are not to exceed 2000 V. The minimum installation temperature is −40 °C.1.3 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 In many instances the insulation material cannot be tested unless it has been formed around a conductor or cable. Therefore, tests are done on insulated wire or cable in this document solely to determine the relevant property of the insulation material and not to test the conductor or completed cable.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： 515元 / 折扣价： 438 元 加购物车

1.1 This practice covers estimating the consistency of thermal insulating cements, after mixing with a known amount of water. The consistency of a wet cement affects such properties as ease of toweling, wet adhesion, drying shrinkage, dry density, and thermal conductivity. 1.2 This practice estimates consistency of thermal insulating cements in terms of either percentage of deformation as described in Method A or inches of penetration as described in Method B. 1.3 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only. 1.4 This standard does not purport to address all of the safety problems, 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.

定价： 0元 / 折扣价： 0 元