This paper analyses the specification and type testing of cylinder valves for non-refillable cylinders at home and abroad.

对非重复充装瓶阀的技术要求和型式试验采用的国家标准和欧洲标准进行了比较分析。

youdao

This paper analyses the specification and type testing of cylinder valves for non-refillable cylinders at home and abroad.

对非重复充装瓶阀的技术要求和型式试验采用的国家标准和欧洲标准进行了比较分析。

youdao