The focus is on the concept, importance and basic demands of self - protection of coal miners. Measures are put forward to enhance self - protection.

 
  • 就煤矿职工的自我保护从涵义、重要性和基本要求进行论述,并提出加强和提高自我保护工作的措施。
今日热词
目录 附录 查词历史