| |||
female screw thread | |||
female screw | |||
box tread; inner screw; internal thread | |||
negative thread | |||
female thread; internal screw thread | |||
| |||
box tread; negative thread | |||
| |||
female | |||
| |||
female |
阴 螺纹: 12 phrases in 6 subjects |
Drilling | 2 |
Exhibitions | 1 |
Mechanics | 2 |
Oil / petroleum | 2 |
Shipbuilding | 1 |
Technology | 4 |