 |
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| flat set copper; tough cake; tough copper; tough pitch; tough pitch copper | |||
| annealed copper; tough copper cake; tough pitch copper | |||
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| tough pitch copper | |||
| annealed copper | |||
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| tough pitch copper | |||
| 韧铜: 21 phrases in 7 subjects |
| Automobiles | 1 |
| Aviation | 1 |
| Electric machinery | 4 |
| Electronics | 2 |
| General | 3 |
| Metallurgy | 2 |
| Technology | 8 |