... canopy hood 保温炉排风罩,伞形罩... canopy guard 护顶 What under god's canopy…? 到底…? 究竟…?...
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研究证明，液压护顶长壁法是开采缓倾斜极薄类铁矿床最优的采矿方法。
The research result shows that longwall mining method with hydraulic pressure frame supporting capping rock is the optimal mining proposal for the gently inclined and extremely thin iron mine.
针对现场的需要，设计制备了一种以改性MC尼龙为原材料的护顶铰接顶梁。
In view of the worksite demand, a noosing cross beam for the lop protection was designed with MC nylon as raw material.
通过多种采矿方法的技术经济分析，认为采用锚杆护顶的全面采矿法较为合理。
Technological and economical analyses show that the breast stoping with roof bolting is more reasonable than others.
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