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定心孔
| 塞
| 定心孔 | |
| construct. | internal centre; internal point |
| met. | centring hole |
| railw. | centering hole |
| 塞 | |
| gen. | cork; stopper; stuff; top |
| dril. | plug |
| |||
| centring hole | |||
| centering hole | |||
| internal point | |||
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| internal point | |||
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| internal centre | |||
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定心孔 : 19 phrases in 8 subjects |
| Automobiles | 1 |
| General | 2 |
| Mechanic engineering | 1 |
| Mechanics | 1 |
| Metallurgy | 6 |
| Plastics | 1 |
| Shipbuilding | 4 |
| Technology | 3 |
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