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| 材料类型; 物料类型 | |||
| 材料型号 | |||
| 文献类别; 资料类别; 资料类型; 资料种类 | |||
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material type : 27 phrases in 10 subjects |
| Business | 2 |
| Chemistry | 2 |
| Ecology | 1 |
| Explosives and Explosive Ordnance Disposal | 1 |
| Materials science | 5 |
| Metallurgy | 2 |
| Plastics | 2 |
| Semiconductors | 2 |
| Space | 3 |
| Technology | 7 |