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GB/T 20990.1-2020 高压直流输电晶闸管阀第1部分:电气试验

GB/T 20990.1-2020.Thyristor valves for high voltage direct current ( HVDC) power...

TB 1169-91.1主题内容与适用范围TB 1169规定了铁路长途、区段、地区、站场通信工程图形符号。TB 1169适用于铁路通信工程设计的通信网图，系统图...

GB/T 30024-2020.Cranes-Proof of competence of steel structures.1范围GB/T 30024基于极限...

YY/T 0739-2009.Particular specifications for wall stand of medical X-ray equipme...

GB/T 2976-2020.Metallic materials-Wire-Wrapping test.1范围GB/T 2976规定了金属材料线材缠绕试验方法...

TB/T 1240-2009.Bush of locomotive and rolling stock.1范围TB/T 1240规定了机车车辆用钢衬套、ADI衬...

GB/T 39825-2021.Light conveyor belts-Principal characteristics and applications....

GB/T 21838.4-2020.Metallic materials-Instrumented indentation test for hardness...

TB 1406-81.TB 1406适用于轨道车牵引的PC16型十六吨平板拖车。一结构型式和基本参数1结构型式1.1 两轴导框式转向架;1.2空气制动与手制动双...

GB/T 39822-2021.Plastics-Determination of yellowness index and change in yellown...

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