我并没有说那些钻杆他们是否都检查过。
操作时要求钻杆垂直，钻孔过程中如发现钻杆摇晃或难钻进时，可能是遇到石块等异物，应立即停机检查。
Operation requirements of vertical borehole drilling, found the process of drill pipe shakes or difficult drilling, stones and other foreign bodies may be encountered, should immediately stop check.
应用推荐