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| piston alloy (4Cu； 0.5Mg;2Ni;余量 Al) | |||
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活 塞 合金 : 19 phrases in 7 subjects |
| Automobiles | 3 |
| Chemistry | 1 |
| Compressors | 3 |
| General | 2 |
| Metallurgy | 5 |
| Steel production | 1 |
| Technology | 4 |
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