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| ballscrew | |||
| ball-screw; ball-type screw | |||
| ball screw | |||
| ball lead screw | |||
| 滚珠 丝杠: 9 phrases in 5 subjects |
| Automobiles | 3 |
| Aviation | 1 |
| Computer numerical control | 3 |
| Space | 1 |
| Steel production | 1 |
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