| |||
| 左旋螺纹 | |||
| 左螺纹 | |||
| 倒牙 | |||
| |||
| 左螺纹 | |||
| ★ 左旋螺纹 | |||
| 反扣 | |||
| 反扣螺纹 | |||
| 左旋螺纹; 反螺纹 | |||
| |||
| 左旋螺纹; 倒牙 | |||
|
left-handed thread : 10 phrases, 4 sujets |
| Architecture | 1 |
| Forage | 3 |
| Pétrole / pétrole | 2 |
| Technologie | 4 |
| |||
| 左旋螺纹 | |||
| 左螺纹 | |||
| 倒牙 | |||
| |||
| 左螺纹 | |||
| ★ 左旋螺纹 | |||
| 反扣 | |||
| 反扣螺纹 | |||
| 左旋螺纹; 反螺纹 | |||
| |||
| 左旋螺纹; 倒牙 | |||
|
left-handed thread : 10 phrases, 4 sujets |
| Architecture | 1 |
| Forage | 3 |
| Pétrole / pétrole | 2 |
| Technologie | 4 |