国家对煤矿井下作业的职工采取特殊保护措施。
The State shall take special protective measures for miners working in underground coal mines.
国家对煤矿井下作业的职工采取特殊保护措施。
The state shall adopt special protective measures for workers operating in the pit.
目的了解煤矿井下作业噪声危害现状，探讨防治对策。
Noise hazard of coal mine operation is serious, and needs comprehensive control.
目的了解煤矿井下作业噪声危害现状，探讨防治对策。
Noise hazard of coal mine operation is serious, and needs comprehensive control.
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