roof bolt hole的意思|示意
美 / /
英 / /
顶板锚杆钻孔
roof bolt hole的网络常见释义
顶板锚杆钻孔 ... 顶板木锚杆：wood roof pin 顶板锚杆钻孔：roof bolt hole 顶板锚杆支护：back bolting ...
roof bolt hole相关例句
There are many kinds of strata in roof bolt hole. Proper using and choosing are available for increasing comprehensive benefit.
锚杆钻孔所遇岩层种类较多，合理地选择锚杆钻头类型有利于提高综合效益。