阑述了低压铸铁弹性阀座闸阀的设计特点、分类和用途。

Clarify the design Peculiarity and classification and USES of resilient-seated gate valve.

youdao

阑述了低压铸铁弹性阀座闸阀的设计特点、分类和用途。

Clarify the design Peculiarity and classification and USES of resilient-seated gate valve.

youdao