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| 第九格 | |||
| 底架; 砂箱底板 | |||
| 机座构架; 机座底架; 基础构架 | |||
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foundation frame : 10 phrases in 4 subjects |
| Engineering geology | 2 |
| Metallurgy | 2 |
| Plastics | 1 |
| Technology | 5 |
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