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| 方形轧槽 | |||
| 方形孔型轧槽 | |||
| 方头; 方形孔型; 平头坡口 | |||
| 方孔型 | |||
| 平头坡口 (焊体); 无坡口; 四方进刀架; 方槽; 不开坡口; I型槽; I形坡口; 平头槽 | |||
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square groove : 8 phrases in 4 subjects |
| Compressors | 1 |
| Electric machinery | 1 |
| Metallurgy | 3 |
| Technology | 3 |
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