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| 半圆头; 半球头; 杯形机头 | |||
| cup head: 23 phrases in 8 subjects |
| Architecture | 1 |
| Automobiles | 3 |
| Aviation | 1 |
| Construction | 2 |
| Drilling | 1 |
| Metallurgy | 1 |
| Oil / petroleum | 2 |
| Technology | 12 |
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