under-reaming

英['ʌndərr'iːmɪŋ] 美['ʌndərr'iːmɪŋ]
  • 扩孔
  • crack v.破裂;砸开;发出爆裂声;撞击;破解;变嘶哑;崩溃;制裁;开玩笑n.裂缝;裂痕;爆裂声;猛击;尝试;俏皮话adj.训练有素的
    1. One technique is to use power reaming to penetrate the first cortex and then switch to hand reaming.
      可以用电钻突破第一层皮质,然后换成手摇钻扩孔。
    2. The effects of water jet parameters and drill motion parameters on the soil reaming were investigated by an indoor test.
      通过实验,研究了射流参数和钻杆运动参数对扩孔效果的影响。