... bench hole 梯段的下向垂直炮眼 bench mining 阶梯式开采 bench preparation 阶段准备 ...
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bench h preparation 阶段准备
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Clean Bench has the advantage of easy to operate freely, more comfortable, efficient, preparation time is short, the boot can be operated for more than a very minute, basically ready to use.
超净工作台的优点是操作简单自如，较为舒适，工作效率高，预备时间短，开机十分分钟以上即可操作，基本上可随时使用。
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