定价： 3348元 / 折扣价： 2846 元

定价： 345元 / 折扣价： 294 元 加购物车

定价： 1957元 / 折扣价： 1664 元 加购物车

定价： 819元 / 折扣价： 697 元 加购物车

定价： 156元 / 折扣价： 133 元 加购物车

定价： 0元 / 折扣价： 0 元 加购物车

定价： 819元 / 折扣价： 697 元 加购物车

定价： 1957元 / 折扣价： 1664 元 加购物车

定价： 689元 / 折扣价： 586 元 加购物车

This guide is intended to provide a rapid, easy to use method for identifying Committee F16 fastener specifications and their applicable marking requirements. Selection is made by product type (bolts, nuts, washers, etc.) and material (alloy steel, carbon steel, stainless steel, etc.). Table size limitations and the need for simplicity prohibit identifying the exact grade, type, condition, etc., for all product/material combinations. The product specification must be reviewed prior to specifying fasteners on drawings or ordering to properly and completely identify the fastener, and its available variations.1.1 This guide is intended to provide a rapid, easy to use method for identifying Committee F16 fastener specifications and their applicable marking requirements. Selection is made by product type (bolts, nuts, washers, etc.) and material (alloy steel, carbon steel, stainless steel, etc.) from as follows:1.2 Table size limitations and the need for simplicity prohibit identifying the exact grade, type, condition, etc., for all product/material combinations. The product specification must be reviewed prior to specifying fasteners on drawings or ordering to properly and completely identify the fastener, and its available variations.

定价： 0元 / 折扣价： 0 元

1.1 This index identifies specifications that cover ductile iron pressure pipe suitable for carrying water and other liquids under pressure.NOTE 1: The text of this standard references notes and footnotes which provide explanatory material. These notes and footnotes (excluding those in tables and figures) shall not be considered as requirements of the standard.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： 515元 / 折扣价： 438 元 加购物车

1.1 These specifications cover operating instructions for glass capillary kinematic viscometers of all the types described in detail in Annex A1, Annex A2, and Annex A3 as follows:  Modified Ostwald viscometers, Annex A1  Suspended-level viscometers, Annex A2  Reverse-flow viscometers, Annex A31.2 The calibration of the viscometers is described in Section 6.1.3 This standard covers some widely used viscometers suitable for use in accordance with Test Method D445. Other viscometers of the glass capillary type which are capable of measuring kinematic viscosity within the limits of precision given in Test Method D445 may be used.1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.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： 843元 / 折扣价： 717 元 加购物车

4.1 All three tests may be used for product design qualification.4.2 This specification covers the minimum electrical, chemical, and physical properties designated by the manufacturer and the detailed procedures by which such properties are to be determined. The purchaser has the option to perform or have performed any of these tests and may reject equipment that fails to meet the standard criteria. Claims concerning failure to meet the specification are subject to verification by the manufacturer.4.3 Plastic guard equipment is used for protection against accidental brush contact by the worker. A margin of safety shall be provided between the maximum voltage at which they are used and the proof-test voltage at which they are tested. This relationship is shown in Table 1 and Table 2. The equipment is designed only for phase-to-ground or covered phase-to-covered-phase exposure.NOTE 1: Rubber insulating equipment is realistically limited to Class 4 material in the design specification standards. Plastic guard equipment has been designed to go beyond these voltages and provide a satisfactory degree of worker protection. Major differences exist in use criteria between the rubber and the plastic guard equipment. Each glove, sleeve, or other article of rubber insulating equipment has a given safety factor for the phase to phase voltage on which it may be used and the class or proof voltage at which it is tested. Plastic guard equipment, however, is designed to provide a satisfactory safety factor only when used in a phase-to-ground exposure. If exposure is phase-to-phase, then a satisfactory safety factor is only provided if the exposure is covered-phase-to-covered-phase.4.4 Work practices vary from user to user, dependent upon many factors. These may include, but are not limited to, operating system voltages, construction design, work procedure techniques, weather conditions, etc. Therefore, except for the restrictions set forth in this specification because of design limitations, the use and maintenance of this equipment is beyond the scope of this specification.4.5 It is common practice and the responsibility of the user of this type of protective equipment to prepare complete instructions and regulations to govern in detail the correct and safe use of such equipment.1.1 These test methods cover three electrical tests on plastic guards and assembled guard systems. They are:1.1.1 Method A—Withstand voltage proof test,1.1.2 Method B—Flashover voltage, and1.1.3 Method C—Leakage current.1.1.4 This specification covers plastic guard equipment and guard systems used by workers for temporary insulation on electric power circuits.1.1.5 Plastic guard equipment covered by this specification is rated for momentary, or brush contact only. Maximum-use voltages are covered in Table 1 and Table 2.(A) Cover-up materials are tested at values greater than the maximum use phase to ground values. The maximum use phase to phase values relate to guarded phase to guarded phase. The units are not rated for bare phase to guarded phase potentials.(A) Cover-up materials are tested at values greater than the maximum use phase to ground values. The maximum use phase to phase values relate to guarded phase to guarded phase. The units are not rated for bare phase to guarded phase potentials.1.2 These test methods cover, but are not limited to, the following typical guards:1.2.1 Conductor Guards and Connecting Covers as follows: 1.2.1.1 Line guards,1.2.1.2 Line guard connectors,1.2.1.3 Insulator covers,1.2.1.4 Dead-end covers,1.2.1.5 Bus guards, and1.2.1.6 Bus “T” guards.1.2.2 Structure and Apparatus Covers as follows: 1.2.2.1 Pole guards,1.2.2.2 Ridge pin covers,1.2.2.3 Switch blade covers,1.2.2.4 Arm guards,1.2.2.5 Cutout covers,1.2.2.6 Structural barriers, and1.2.2.7 Cross arm guard.1.3 It is common practice for the user of this equipment to prepare instructions for the correct use and maintenance.1.4 The use and maintenance of this equipment is beyond the scope of these test methods.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 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.1.7 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： 590元 / 折扣价： 502 元 加购物车

This specification covers unfilled, filled, and reinforced styrene acrylonitrile (SAN) materials suitable for injection molding and extrusion. SAN compounds are typically general-purpose materials used in either molding or extrusion processes or applications. There are currently no group, class, or grade distinctions and no basic property table given. The SAN compounds are produced by the polymerization of the monomers acrylonitrile and styrene. The melt-flow rate, Vicat softening point, heat-deflection temperature, tensile strength at yield, flexural modulus, and glass content shall be tested to meet the requirements prescribed.1.1 This specification covers unfilled, filled, and reinforced styrene acrylonitrile (SAN) materials suitable for injection molding and extrusion.1.2 This classification system and subsequent line callout (specification) are intended to provide a means of calling out plastic materials used in the fabrication of end items or parts. It is not intended for the selection of materials. Material selection can be made by those having expertise in the plastic field only after careful consideration of the design and the performance required of the part, the environment to which it will be exposed, the fabrication process to be employed, the costs involved, and the inherent properties of the material other than those covered by this standard.1.3 The properties included in this standard are those required to identify the compositions covered. Other requirements necessary to identify particular characteristics important to specialized applications are to be specified using the suffixes specified in Section 5.1.4 The values stated in SI units are to be regarded as the standard. The values in parentheses are given for information only.1.5 The following precautionary caveat pertains only to the test methods portion, Section 11, of this specification: 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.NOTE 1: This standard and ISO 19064-1 and ISO 4894-2 address the same subject matter, but differ in technical content. Although this standard and ISO 19064-1 and ISO 4894-2 differ in approach or detail, data obtained using either are technically equivalent.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

5.1 These specifications are designed to ensure that evidence associated with a sexual violence investigation is handled and analyzed in the most useful manner and without wasting evidentiary materials and analytical time or resources, or both.AbstractThese specifications describe the basic elements of a request for the scientific examination of physical evidence collected in the investigation of a sexual assault. These specifications outline considerations that will facilitate the analysis of sexual assault evidence by a potentially large group of forensic experts. The request for scientific examination of sexual assault evidence should include a completed sexual assault medical/nurse sexual assault examiner/medical examiner evaluation form in accordance with the requirements.1.1 These specifications describe the basic elements of a request for the scientific examination of physical evidence collected in the investigation of a sexual violence incident. These specifications are designed to be used in conjunction with other specifications, guides, and practices associated with sexual violence examinations that are listed in Section 2.1.2 These specifications outline considerations that facilitate the analysis of sexual violence evidence by forensic experts. These experts can include, but are not limited to, serologists, toxicologists, pathologists, odontologists, latent print examiners, firearm and toolmark examiners, and trace materials analysts. The success of their combined work requires a clear understanding of the issues and relationships involved in the case.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