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定价： 260元 / 折扣价： 221 元 加购物车

定价： 481元 / 折扣价： 409 元

定价： 481元 / 折扣价： 409 元 加购物车

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定价： 156元 / 折扣价： 133 元 加购物车

定价： 819元 / 折扣价： 697 元

This specification covers the requirements for smooth-wall perforated and nonperforated poly(vinyl chloride) (PVC) plastic pipe and couplings for use in subsurface drainage systems of highways, airports, and similar applications. Two classes (or pipe stiffness) are included and designated as PS 28 and PS 46. The pipe stiffness, impact resistance, pipe flattening, and solvent cement joint tightness shall be tested to meet the requirements prescribed.1.1 This specification covers the requirements for smooth-wall perforated and nonperforated poly(vinyl chloride) (PVC) plastic pipe and couplings for use in subsurface drainage systems of highways, airports, and similar applications in nominal sizes of 4, 6, and 8 in. and in pipe stiffnesses (PS) that are designated as Type PS 28 and Type PS 46 in accordance with its minimum pipe stiffness.1.2 Molded fittings for use with highway underdrain pipe are in accordance with Specification D3034. For convenience, some of these fittings are reproduced in Annex A1.1.3 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only.NOTE 1: Type PS 28 and Type PS 46 indicate “pipe stiffness” of 28 and 46, respectively, as outlined in 11.1.NOTE 2: Pipe and fittings should be installed in accordance with Practice D2321, or applicable state or local specifications.1.4 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.1.5 The following safety hazards 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, 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

定价： 5597元 / 折扣价： 4758 元

定价： 592元 / 折扣价： 504 元

1. Scope This International Standard applies to residual current operated circuit-breakers functionally independent of, or functionally dependent on, line voltage, for household and similar uses, not incorporating overcurrent protection (hereafter refe

定价： 2139元 / 折扣价： 1819 元

1.1 Scope 1.1.1 This International Safety Standard applies to electronic apparatus designed to be fed from the MAINS, from a SUPPLY APPARATUS, from batteries or from REMOTE POWER FEEDING and intended for reception, generation, recording or reproductio

定价： 2275元 / 折扣价： 1934 元

Amendment 1:2006 to CAN/CSA-C22.2 No. 60065-03, Audio, Video and Similar Electronic Apparatus - Safety Requirements (Adopted Amendment 1:2005 to CEI/IEC 60065:2001) | Modification 1:2006 à CAN/CSA-C22.2 no 60065-03, Appareils audio, vidéo et appareils éle

定价： 819元 / 折扣价： 697 元

This specification covers carbon steel plates, intended for forging, quenching-and-tempering, and similar applications in which uniformity of composition and freedom from injurious imperfections are important. Heat analysis of steel shall conform to the chemical requirements for carbon, manganese, phosphorus, sulfur, and silicon.1.1 This specification covers carbon steel plates, forging quality, intended for forging, quenching-and-tempering, and similar applications in which uniformity of composition and freedom from injurious imperfections are important.1.2 The plates are available in six grades, or chemical compositions.1.3 When the steel is to be welded, it is presupposed that a welding procedure suitable for the grade of steel and intended use or service will be utilized. See Appendix X3 of Specification A6/A6M for information on weldability.1.4 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 non-conformance with the 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： 515元 / 折扣价： 438 元 加购物车