GB/T 39859-2021.Gallium-based liquid metal.1范围GB/T 39859规定了镓基液态金属的技术要求、试验方法、检验规则、标志、包装、运输、贮存,以及随行文...
GB/T 39861-2021.Electrochemical performance test of lithium manganese oxide-Test method for discharge plateau capacity ratio and cycle life.1范围GB/T 39861规定了锂离子电池正...
GB/T 39864-2021.Electrochemical performance test of lithium manganese oxide-Test method for the initial specific discharge capacity and the initial efficiency.1范围GB/T 39864规定了...
GB/T 39963-2021.Technical specification on C80~ C100 concrete shaft lining applied in vertical freezing shaft.1范围GB/T 39963规定了立井冻结法凿井井壁应用C80~C100混凝...
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...
GB/T 17467-2020.High-voltage/ low-voltage prefabricated substation.1范围GB/T 17467规定了高压/低压或低压/高压预装式变电站的使用条件、额定值、设计和结构...
GB/T 18802.31-2021.Low-voltage surge protective devices-Part 31: Surge protective devices connected to photovoltaic installations- Requirements and test methods.1范围GB/T 18802.31适...
GB/T 18802.11-2020.Low-voltage surge protective devices (SPD)- Part 11: Surge protective devices connected to low-voltage power systems一Requirements and test methods.1范围GB/T 1...
GB/T 5169.46-2020.Fire hazard testing for electric and electronic products-Part 46: Test flames-Determination of the characteristic heat flux for ignition from a non-contacting flam...
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...
