滑槽式保险安装结构容易，罕用于敞开式插板阀。

Chute-type structure of the insurance is easy to install, rarely used in open-type valve plates.

youdao

滑槽式保险安装结构容易，罕用于敞开式插板阀。

Chute-type structure of the insurance is easy to install, rarely used in open-type valve plates.

youdao