钻地震井用的喷射钻头的英文

geophysical jetting bit

• 钻:    drill; auger
• 地震:    earthquake; earths ...
• 井:    well
• 用:    40分钟跑完全程 run the c ...
• 的:    4次方是 The fourth po ...
• 喷射:    spout; spurt; jet
• 钻头:    boring crown; bore ...