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产品名称：大口径锻打碳钢法兰
法兰口径：DN10-DN5000
法兰材质：碳钢（A3，16Mn，20#，Q235A-B-C…….等） 不锈钢（201，202，301，304，304L，321，316，316L，317….等）
法兰标准：JB82-59 HG5016-58, HG20595-97 ,HG20617-97 ,JB/82.1-94