safety of colliery是什么意思 safety of colliery怎么读
safety of colliery的用法和样例
- The prevention of the occurrence of the electromechanical accidents creates a better environment for the safety in production and sustainable development of the coalmine.
预防煤矿机电事故的发生可为煤矿安全生产与可持续发展创造了一个更加良好的环境。
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