| |||
凿岩钻〔钎〕头 | |||
牙轮钻头 | |||
凿岩钻头; 岩芯钻头 | |||
牙轮【岩石】钻头 | |||
钻岩钻头 | |||
凿岩钎头 |
rock bit : 59 phrases in 8 subjects |
Bridge construction | 1 |
Company name | 2 |
Drilling | 11 |
Engineering geology | 4 |
Explosives and Explosive Ordnance Disposal | 1 |
Metallurgy | 1 |
Oil / petroleum | 9 |
Technology | 30 |