Roll Flower Design Practice - CN109351803B
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# Keywords: Roll forming, Roll flower, ... .
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# REF = 張堯,盛珍劍,阮建剛, 2020-0512, CN109351803B-P形鋼管的成型方法, 武漢鋼鐵江北集團冷彎型鋼有限公司.
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