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(20cr,40cr,42crmo)无缝钢管-山东聊城凯泰管业...
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山东聊城凯泰管业有限公司(***)专业销售各种规格钢管:20cr无缝钢管,40cr无缝钢管,42crmo无缝钢管,规格齐全,库存充足,可定做各种特殊规格,"低碳经营,质量第一"的销售原则,是新老朋友合作的不二选择,热忱欢迎广大新老客户来电...r钢管 20cr无缝钢管 40cr合金钢管 20cr无缝管 40cr合金钢管 40cr厚壁钢管 40cr...
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