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| box pass sequence (【技】矩形和方形孔型交替出现的孔型系统。适用于初轧机、轨梁轧机、中小型和线材的开坯、大断面的成品方钢等。) | |||
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箱形孔型系统 : 2 phrases in 1 subject |
| Metallurgy | 2 |
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