钻杆

• Petroleum equipment - thread gages for rotary shouldered connections
  石油钻杆接头螺纹量规
• Rotary drill rod used for coal mining roofbolter
  煤矿锚杆钻机用回转钻杆
• Slack off drill pipe and release running tool
  放松钻杆并卸开下入工具
• Close the upper pipe ram and open the kill line valve
  关上部钻杆闸板防喷器，开压井管线阀。
• Drill rod of raise boring machine for coal mine
  煤矿用反井钻机钻杆
• Petroleum and natural gas industries - aluminium alloy drill pipe
  石油和天然气工业.铝合金钻杆
• Automated centering system for drill stem friction welding machine
  石油钻杆摩擦焊自动对中系统
• Rods , cylpebs , balls different types
  钻杆cylpeps滚珠多种的配料
• Petroleum and natural gas industries - aluminium alloy drill pipes
  石油和天然气工业.铝合金钻杆
• Retrieve the running tool and the string
  收回下入工具及钻杆。