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| 弹簧枢轴 | |||
| 装在地板支承摆门的弹簧铰链; 弹簧支枢; 弹簧销 | |||
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spring pivot : 12 phrases in 5 subjects |
| Automobiles | 1 |
| Electric machinery | 2 |
| Oil / petroleum | 1 |
| Space | 1 |
| Technology | 7 |
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