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我厂的铸钢轧辊,过去须要向外购买,解放后49年起,开始自己铸造,大小有254及430公厘直径两种,浇铸方法如图所示.
Our factory’s cast steel roll, in the past need to be purchased outside, 49 years after liberation began to cast their own, the size of 254 and 430 mm diameter two, the casting method as shown.