Profile (flatness) : after the establishment of coiling tension, there shall be no wave in the F4 mill stand exit in visual.
板形(平直度)：在卷取张力建立后，F4机架出口带材目测无波浪。
Profile (flatness) : after the establishment of coiling tension, there shall be no wave in the F4 mill stand exit in visual.
板形(平直度)：在卷取张力建立后，F4机架出口带材目测无波浪。
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