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钢管内径外径对照表大外径系列公称直径管道外径公称直径管道外径DN1522mmDN150168mmDN2027mmDN200219mmDN2534mmDN250273mmDN3242mmDN300324mmDN4048mmDN350360mmDN5060mm DN400406mmDN6576mmDN450457mmDN8089mmDN500508mmDN100114mmDN600610mmDN125140mm小外径系列 公称直径管道外径公称直径管道外径DN1518mmDN150159mmDN2025mmDN200219mmDN2532mmDN250273mmDN3238mm DN300325mmDN4045mmDN350377mmDN5057mmDN400426mmDN6573mmDN450480mmDN8089mm DN500530mmDN100108mmDN600630mmDN125 133mm1
