深孔钻孔的英文

deep hole drilling

• 深:    deep
• 孔:    hole; opening; ape ...
• 钻孔:    drill; bore; drill ...

例句与用法

1. Since the pebble structure is of big pellet easy to be permeated ant it is difficult to smash and drill , the appliance with big diameter and deep cast - in - place pile has been greatly restricted
   卵石地基具有颗粒大、透水性强、进尺和破碎困难、容易垮孔等困难，限制了大直径深孔钻孔灌注桩在其中的应用。