海南炼化新建乙烯区换热器清洗场地项目需求计划-PVC管中国石化海南炼油化工有限公司PE给水管\活套法兰 电熔 dn400 PN0.6/GB/T13663.3PE给水管\活套法兰 电熔 dn500 PN0.6/GB/T13663.3PE给水管\偏心大小头 电熔 dn500 ×400 PN0.6/GB/T13663.3PE给水管\等径三通 电熔 dn500 PN0.6/GB/T13663.3PE给水管\90°弯头 电熔 dn500 PN0.6/GB/T13663.3PE给水管\热熔/dn500 PN0.6 GB/T13663.2
2026-05-12