井下的环境监测和人员定位是矿井安全管理中最为重要的环节。

In security management in mine, underground environment monitor and person localization are the most important.

youdao

井下的环境监测和人员定位是矿井安全管理中最为重要的环节。

In security management in mine, underground environment monitor and person localization are the most important.

youdao