| |||
| 圆牙螺纹 | |||
| 圆扣 | |||
| 圆丝扣 | |||
| 圆螺纹 | |||
| 圆形螺纹 | |||
|
round thread : 13 phrases in 6 subjects |
| Drilling | 2 |
| General | 2 |
| Metallurgy | 1 |
| Oil / petroleum | 1 |
| Technology | 4 |
| Textile industry | 3 |
| |||
| 圆牙螺纹 | |||
| 圆扣 | |||
| 圆丝扣 | |||
| 圆螺纹 | |||
| 圆形螺纹 | |||
|
round thread : 13 phrases in 6 subjects |
| Drilling | 2 |
| General | 2 |
| Metallurgy | 1 |
| Oil / petroleum | 1 |
| Technology | 4 |
| Textile industry | 3 |