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原苏联每年生产近400台露天采矿穿孔用的牙轮钻机,由于作业地点和钻机的振动,就总体而言,没有充分达到设计能力。钻机机械穿孔速度、钻机的技术生产率和钻具使
In the former Soviet Union, nearly 400 open-cast cone-roller drills were produced every year, and overall the design capability was not achieved due to the vibration of the work site and rig. Drilling machine mechanical piercing speed, drilling rig technical productivity and drilling tools to make