本校准规范规定了通信用光衰减器的通用的计量特性、校准方法及校准所用的仪器设备的要求等内容，适用于通信用光衰减器的首次校准、后续校准和使用中检验。光衰减器的型式评价中有关计量特性的要求可参照本规范执行。其他带光衰减功能的仪器校准也可参照执行。

定价： 24元 / 折扣价： 21 元 加购物车

本规程适用于测量剂量范围在 0.01 mSv～10 Sv，能量范围为80 keV～1.3 MeV的光子外照射个人剂量当量Hp(10)和周围剂量当量H*(10)，以及能量范围为30 keV～250 keV的个人剂量当量Hp(0.07)的光释光剂量测量系统的首次检定、后续检定和使用中检查。
本规程不适用于配用肢端剂量计的个人剂量监测装置。

定价： 41元 / 折扣价： 35 元 加购物车

本标准适用于电网企业、发电企业、电力建设企业以及重要电力用户的电测技术监督。

定价： 24元 / 折扣价： 21 元 加购物车

本标准规定了对视频资料连续性检验的软件、硬件、评价方法和检验记录的要求。
本标准适用于法庭科学领域对视频资料的检验鉴定。

定价： 21元 / 折扣价： 18 元 加购物车

本文件规定了甘油三酯测定试剂盒（酶法)的要求、试验方法、标识、标签和使用说明书、包装、运输和贮存等内容。
本文件适用于基于分光光度法原理的甘油三酯测定试剂盒（酶法)的质量控制，该产品用于体外定量测定人体血清或血浆中甘油三酯（TG)的量。

定价： 24元 / 折扣价： 21 元 加购物车

定价： 975元 / 折扣价： 829 元 加购物车

本标准规定了甘油三酯测定试剂盒(酶法)的测定原理、要求、试验方法、标识、标签和使用说明书、包装、运输和贮存。
本标准适用于甘油三酯测定试剂盒(酶法)的质量控制，该产品用于体外定量测定人体血清或血浆中甘油三酯(TG)的量。

定价： 24元 / 折扣价： 21 元 加购物车

4.1 The advantages of the Clarke-Bumpus plankton sampler are as follows:4.1.1 It will sample a discrete depth or multiple depths, depending upon the sampling design.4.1.2 It is a slow to medium speed sampler requiring a towing speed of three to five knots.4.1.3 The sample size can be easily controlled.4.1.4 The sampler is lightweight and can be used without auxiliary equipment.4.1.5 It has a relatively high filtration efficiency factor of 0.88.4.1.6 It is a versatile sampler and can be used in all but the shallowest waters.4.1.7 The flowmeter records the amount of water that passes into the net.4.1.8 Overspill of water at the mouth of the net due to excess speed of towing is of minimal consequence.4.2 The disadvantages of the Clarke-Bumpus plankton sampler are as follows:4.2.1 The flowmeter requires frequent maintenance including calibration and lubrication.4.2.2 It is not suitable for use in very small areas or shallow waters.4.3 There are several special considerations that shall be observed when using a Clarke-Bumpus plankton sampler. They are:4.3.1 The flowmeter should be calibrated and serviced frequently to ensure efficient and accurate operation.4.3.2 The sampler is relatively fragile, particularly the closing device and flowmeter. This necessitates careful deployment and recovery procedures.4.3.3 Following each collection, the net must be thoroughly washed.4.3.4 Special attention must be given to the strength of the cable and its attachment to avoid loss of the sampler.4.3.5 The sampler should not be used in beds of macrophytes, in waters containing submerged objects, or close to the bottom.4.3.6 The net should be inspected frequently for pin-size holes, tears, net deterioration, and other anomalies.4.3.7 Following use, the wet net should be suspended full length in the air in subdued light and allowed to dry.1.1 This practice covers the procedures for obtaining quantitative samples of a zooplankton community by use of a Clarke-Bumpus plankton sampler.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 加购物车

定价： 571元 加购物车

本标准规定了短波广播发射台电磁辐射环境监测的内容、方法等技术要求本标准适用于短波广播发射台的电磁辐射环境监测

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本标准规定了农资零售市场信息采集的术语和定义、采样点管理方法、采集内容构成、编码方法与代码结构、管理要求本标准适用于农资零售市场监测分析中对信息采样点和采集内容的管理

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本标准规定了棉籽中转基因成分的定性PCR检测方法。
本标准适用于棉籽及粗加工产品中抗鳞翅目昆虫棉花SGK321、SGK9708、GK1、GK2、GK3、GK5、GK12、GK19、GK22、GK951转基因成分普通PCR筛选检测和转基因棉花品系MON531、MON1445和MON15985实时荧光PCR的品系鉴定。

定价： 21元 / 折扣价： 18 元

定价： 无文本 / 折扣价： 0 元

定价： 无文本 / 折扣价： 0 元