Valve shall be provided by manufacturer cleaned and bagged for oxygen service.

新购买的阀门应该经过制造商的清洗和包装，适用于氧气管道系统。

youdao

Valve shall be provided by manufacturer cleaned and bagged for oxygen service.

新购买的阀门应该经过制造商的清洗和包装，适用于氧气管道系统。

youdao