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nec： ? April 2nd, "Xugong electricity supplier cross platform platform first batch of...，...
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nec： ? t needs Bole's appreciation and training, and equipment needs maintenance an...，...
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nec： ? In June 14th, 2 people were killed and 4 people were injured in the industrial z...，...
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nec： ? 1. what is mine gas?Mine gas is a harmful gas mainly composed of coal bed methan...，...
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nec： ? In March 31st, the Weifang Municipal Council convened the city's public secu...，...
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nec： ? The State Administration of safety and Supervision issued a notice in recent day...，...
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nec： ? 礦井提升機又稱為絞車或卷揚機，其用途是利用鋼絲繩的纏繞，以完成提升或下放貨載的任務，是礦井提升的主要設備。非煤礦山使用的提升機主要有三種系列，即單筒單繩纏繞...，...
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nec： ? In case of rollover accident, the excavator should be in horizontal position whe...，...
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nec： ? At present, the development of the global economy, the continuous progress of ro...，...
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nec： ? A few days ago, the results of the mine supervision of 62 mines in Zhejiang prov...，...
