| |||
copper | |||
red copper | |||
Cu | |||
red brass | |||
| |||
copper |
紫 铜 : 48 phrases in 13 subjects |
Automobiles | 1 |
Ceramics | 1 |
Construction | 1 |
Earth sciences | 1 |
Electric machinery | 1 |
Exhibitions | 1 |
General | 2 |
Metallurgy | 7 |
Oil / petroleum | 1 |
Shipbuilding | 1 |
Technology | 28 |
Textile industry | 2 |
Wind Energy | 1 |