borehole

• Borehole - data transmission system
  井内数据传输系统
• Borehole gravity density logging
  井下重力密度测井
• Construction technique of deep - borehole smooth blasting used in rock cut
  中深孔光面爆破技术在岩巷施工中的应用
• Standard guide for planning and conducting borehole geophysical logging
  地球物理测井的钻孔计划和实施的标准指南
• Borehole compensated sonic logger
  补偿声波测井仪
• General technical condition of all - direction borehole inclinometer for mining
  矿用全方位钻孔测斜仪.通用技术条件
• Elementary analysis of surface borehole stability in gob area methane drainage
  地面采空区瓦斯抽放钻孔稳定性分析
• Borehole compensated sonic log
  井眼补偿声波测井
• Compound drum cut hole applied in deep borehole blasting of mine rock roadway
  复式桶形掏槽在岩巷深孔爆破中的应用
• Regular and consistent borehole gauge
  井径规则