钻孔

• Construction technique of pumping hydrotechnic concrete
  钻孔灌注桩施工质量通病初探
• Execution of special geotechnical work - bored piles
  特殊土工工作的实施.螺旋钻孔桩
• Construction technology of drilled pile in karst area
  岩溶地区大直径钻孔桩施工技术
• Any of numerous hand tools for boring holes
  钻孔工具，手钻钻孔用的手持工具
• Drill drivers - split - sleeve , collet - type
  钻孔驱动设备.有缝夹套型对开式套筒
• Their precise ages are thus debatable
  因此，它们被钻孔的时间仍然存在争论。
• Design of the usual equipment of vane hole drilling
  叶片钻孔通用工装的设计
• The electrician is drilling into the ceiling
  那个电工正在往天花板上钻孔。
• A hole or passage made by or as if by use of a drill
  钻孔，打洞用或似用钻打孔或通道
• Measures adopted to strongly wash shaft
  泥浆钻进的钻孔强化洗井应采取的措施