本标准规定了测定色漆、清漆、色漆与清漆用漆基、聚合物分散体和缩聚树脂如酚醛树脂（可熔酚醛、线型酚醛树脂溶液等）的不挥发物含量的方法。

定价： 29元 / 折扣价： 25 元 加购物车

本标准规定了细菌和真菌感染多重核酸检测试剂盒(以下简称“试剂盒”)的术语和定义、要求、试验方法、标签和使用说明书、包装、运输和贮存等。
本标准适用于对人体样本(包括血液、脑脊液和粪便等)或其培养物进行单次检测可报告3种及以上细菌和真菌(以下简称“病原菌”,不包括支原体和衣原体)的试剂盒的质量控制。适用于检测原理为聚合酶链反应等温扩增以及第二代测序等技术的试剂盒。
本标准不适用于单次检测可报告1种或2种病原菌的试剂盒。不适用于单次检测可报告1种或2种病原菌的不同基因的试剂盒。不适用于单次检测可报告1种或2种病原菌的不同型别(基因型或血清型)的试剂盒。

定价： 24元 / 折扣价： 21 元 加购物车

本规范适用于脉冲周期为1 s的脉冲分配放大器的校准。

定价： 32元 / 折扣价： 28 元 加购物车

定价： 1333元 / 折扣价： 1134 元 加购物车

本标准适用于500kV、750kV输电系统中使用的磁控型可控并联电抗器，其他电压等级可参照执行。

定价： 39元 / 折扣价： 34 元 加购物车

本标准规定了自然保护区土地覆被类型分类系统。 本标准适用于森林生态系统、荒漠生态系统、内陆湿地和水域生态系统、野生动物及野生植物类型的自然保护区调查、评价和管理，其他类型自然保护区可参考。

定价： 24元 / 折扣价： 21 元 加购物车

定价： 260元 / 折扣价： 221 元 加购物车

定价： 712元 加购物车

4.1 These fire-test-response test methods evaluate, under the specified test conditions, the ability of a fire-resistive barrier system to inhibit thermal transmission to the electrical system component within.4.2 In these procedures, the specimens are subjected to one or more specific sets of laboratory test conditions. If different test conditions are substituted or the end-use conditions are changed, it is not always possible by or from these test methods to predict changes in the fire test response characteristics measured. Therefore, the results are valid only for the fire test exposure conditions described in these procedures.4.3 These test methods provide a measurement of the transmission of heat to the electrical system components within the barrier system.4.4 These test methods provide qualification of a fireresistive barrier system as one element of an electrical system designed to maintain continuous operation of critical functions and processes for a specific fire resistance rating.4.4.1 In addition to the temperature data provided by these test methods, numerous other factors, such as referenced in 1.4 shall be considered in specifying such a system.1.1 These test methods cover fire-test-response.1.2 These fire-test-response test methods provide information on the temperatures recorded on the electrical system component within a fire-resistive barrier system during the period of exposure.1.3 This standard is used to measure and describe the response of materials, products, or assemblies to heat and flame under controlled conditions, but does not by itself incorporate all factors required for fire hazard or fire risk assessment of the materials, products, or assemblies under actual fire conditions.1.4 Potentially important factors and fire characteristics not addressed by these test methods include, but are not limited to:1.4.1 The performance of the fire-resistive barrier system constructed with components other than those tested.1.4.2 An evaluation of the functionality of the electrical system within the fire-resistive barrier system.1.4.3 An evaluation of the ampacity of the electrical system within the fire-resistive barrier system.1.4.4 An evaluation of the smoke, toxic gases, corrosivity, or other products of heating.1.4.5 A measurement of the flame spread characteristics over the surface of the fire-resistive barrier system.1.4.6 An evaluation of through-penetration sealing methods.NOTE 1: Refer to Test Method E814 for testing of firestop systems.1.4.7 Combustibility of materials in the fire-resistive barrier system or of the electrical system components.1.4.8 The need for supports beyond those normally required.1.4.9 Environmental conditions in the area of service.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 establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.1.7 Fire testing is inherently hazardous. Adequate safeguards for personnel and property shall be employed in conducting these tests.1.8 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： 646元 加购物车

定价： 无文本 / 折扣价： 0 元

本文件规定了钒及钒合金靶材的术语和定义、分类、技术要求、试验方法、检验规则、标志、包装、运输、贮存及随行文件和订货单内容 本文件适用于电子薄膜用钒及钒合金靶材

定价： 无文本 / 折扣价： 0 元

定价： 无文本 / 折扣价： 0 元

本标准规定了烟花爆竹的有关术语和定义。 本标准适用于出口烟花爆竹时相关术语和概念的统一理解和使用，编写标准、技术文件、出版书刊以及学术交流及业务往来中也可参照使用。

定价： 32元 / 折扣价： 28 元

定价： 646元 加购物车

This test method details the standard procedure for measuring the viscosity of resin solutions. The apparatuses required here are constant-temperature water bath, wide-mouthed screw capped bottles, cellophane sheets, No. 2 short taper corks, viscosity tube holder, bottle shaker, timing device, and viscosity tubes. Solid resins are dissolved in organic solvents by cold-cut or hot-cut methods in the laboratory. The viscosity of such prepared solutions, or of commercial solutions of resins is then determined by the bubble time method. The bubble seconds are approximately equal to stokes.1.1 This practice provides instructions for preparing resin solutions viscosity measurement by bubble time method.1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.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. For specific hazard statements, see Section 7.1.4 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 加购物车