The above comprehensive fire prevention measures are effective, and ensure the safety of the working face.

以上综合防灭火措施效果明显，保证了工作面的安全推进。

youdao

The above comprehensive fire prevention measures are effective, and ensure the safety of the working face.

以上综合防灭火措施效果明显，保证了工作面的安全推进。

youdao