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| 圆柱形直螺纹 | |||
| 普通螺纹; 无锥度螺纹; 圆柱螺纹 | |||
| 直螺纹 | |||
| 圆柱形螺纹; 直丝扣 | |||
| straight thread: 15 phrases in 6 subjects |
| Aviation | 2 |
| General | 7 |
| Mechanic engineering | 1 |
| Mechanics | 3 |
| Technology | 1 |
| Textile industry | 1 |
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