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| pierce blank die (class B, 是中等质量的凸模和凹模一一B 级,装在通用或标准模座上进行剪切、冲裁和冲孔。在动力机床上使用) | |||
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冲孔 -冲裁模 B 级 : 2 phrases in 1 subject |
| Aviation | 2 |
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