GB/T 18802.31-2021.Low-voltage surge protective devices-Part 31: Surge protective devices connected to photovoltaic installations- Requirements and te

GB/T 39780-2021.Specifications for evaluating enterprises in waste resource comprehensive utilization. 1范围 GB/T 39780规定了资源综合利用企业的基本要求,生产规模和能力、工艺与设备要求,

GB/T 3684-2021.Conveyor belts-Elctrical conductivity-Specification and test method. 1范围 GB/T 3684规定了输送带的最大表面电阻及试验方法。 GB/T 3684是用来保证输送带有足够的导电性,避免在使用过程中

GB/T 3296-2021.Test method for translucency of daily-use porcelain. 1范围 GB/T 3296规定了日用瓷器制品及胎体材料透光度测定方法的分类、原理、测试仪器、试样、测试方法、结果表示和试验报告。 GB/T 3296适用于日用瓷器制

GB/T 39900-2021.General technical requirements for the road traffic signal control system. 1范围 GB/T 39900规定了道路交通信号控制系统的系统结构、中心控制软件功能要求、性能指标、通信要求、安全要求、

GB/T 17215.221-2021.Electricity metering equipment(a.c.)一General requirements, tests and test conditions- Part 21 :Tariff and load control equipment.

GB/T 39964-2021.Implementation guidance for energy management systems in paper industry. 1范围 GB/T 39964提供了造纸企业建立、实施、保持和改进其能源管理体系的系统性指导建议.包括管理职责、能源方针、策

GB/T 10001.9-2021.Public information graphical symbols-Part 9: Symbols for accessible facilities. 1范围 GB/T 10001的本部分界定了供残疾人、老年人、伤病人及其他有特殊需求的人群使用的无障碍设施

GB/T 39860-2021.Rapid identification of the surface residual mineral powder on latex products-X-ray diffraction spectrometry. 1范围 GB/T 39860规定了采用X-射线衍

GB/T 39966-2021.Guidelines for environmental performance evaluation in waste resource multiple utilization enterprises. 1范围 GB/T 39966规定了废弃资源综合利用业环境绩效

GB/T 39779-2021.Design guidelines for distributed energy system of combined cooling,heating and power. 1范围 GB/T 39779规定了分布式冷热电能源系统设计所涉及的总则、规划决策、工程设计.运

GB/T 39935-2021.Plastics-Film and sheeting-Determination of blocking resistance. 1范围 GB/T 39935规定了采用定性分析和定量分析来评估软质塑料薄膜和片材在指定的温度和压力下,相互贴合一段时间后产生粘连的测定方法