The heavy safety accident and fire accident to be stopped, the normal safety accident frequency rate is less than 1‰.

杜绝重大安全事故和火灾事故的发生，一般安全事故频率<1‰。

youdao

The heavy safety accident and fire accident to be stopped, the normal safety accident frequency rate is less than 1‰.

杜绝重大安全事故和火灾事故的发生，一般安全事故频率<1‰。

youdao