开采台阶 working bench
工罪道 working excavation
采区 working field
工祖高度 working height
使用压力 working pressure
工纂径 working radius
开采煤层 working seam
开采厚度 working thickness
下向开采 working to the dip
向上回采 working to the rise
矿内巷道 workings
蜗轮减速器 worm reducer
工罪道 working excavation
采区 working field
工祖高度 working height
使用压力 working pressure
工纂径 working radius
开采煤层 working seam
开采厚度 working thickness
下向开采 working to the dip
向上回采 working to the rise
矿内巷道 workings
蜗轮减速器 worm reducer
蜗杆螺纹 worm thread
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