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關注：1
2013-05-23 12:21
求翻譯：開拓 采煤 通風 安全措施是什么意思？ 待解決
 懸賞分：1
- 離問題結束還有
開拓 采煤 通風 安全措施
問題補充： |
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2013-05-23 12:21:38
To open up coal mining ventilation and safety measures
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2013-05-23 12:23:18
Pioneering coal mining ventilation safety measures
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2013-05-23 12:24:58
Development mining coal ventilates the security measure
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2013-05-23 12:26:38
Explore mining ventilation safety measures
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2013-05-23 12:28:18
new coal mining ventilation safety measures;
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湖北省互聯網違法和不良信息舉報平臺 | 網上有害信息舉報專區 | 電信詐騙舉報專區 | 涉歷史虛無主義有害信息舉報專區 | 涉企侵權舉報專區
