单词	kelly bar sub
释义	kelly bar sub 方钻杆接头
随便看	vacuum tube multiplier photicon vacuum tube multivoltmeter vacuum tube noise vacuum-tube noise vacuum tube operator vacuum-tube operator vacuum tube oscillator vacuum-tube oscillator vacuum tube powermeter vacuum tube power meter vacuum-tube preamplifier vacuum tube pulser vacuum tube rating vacuum tuberculin vacuum tube receiver vacuum-tube receiving set vacuumtube rectifier vacuum tuber ectifier vacuum tube rectifier vacuum-tube rectifier vacuum tube regeneration vacuum tube register vacuum tube rejuvenator vacuum tube relay vacuum-tube relay