 |
flatbottom | percussion bit
| percussion bit | |
| bridg.constr. | 冲击锥 |
| eng.geol. | 钎头 |
| mech. | 冲击钻头 |
|
flatbottom : 1 phrase in 1 subject |
| Oil / petroleum | 1 |
|
| percussion bit | |
| bridg.constr. | 冲击锥 |
| eng.geol. | 钎头 |
| mech. | 冲击钻头 |
|
flatbottom : 1 phrase in 1 subject |
| Oil / petroleum | 1 |