钻孔

• Approaches to the quality control of drilling perfusion piles
  钻孔灌注桩质量控制初探
• They drilled boulders for inserting dynamite
  他们在大石上钻孔以便装炸药。
• Diamond beveling wheels and drills for glass grinding
  玻璃研磨钻孔钻石工具
• Testing method for the performance of full screw earth auger
  长螺旋钻孔机性能试验方法
• On drilling technique in changing the wheels of winch drum
  绞车滚筒支轮更换的钻孔工艺
• Core hole at r . c . beam for installation of pipes
  直梁上钻孔以便管道安装
• Qingjiang bridge karst geology drill hole pile construction
  清江大桥岩溶地质钻孔桩施工
• Numerical simulation on borehole burst experiment
  钻孔冲击试验的数值模拟
• The improvement of sealling method inside gas drainage hole
  瓦斯抽放钻孔封孔方法的改进