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規(guī)格 DN-公稱直徑 Ф-外徑 DN15- ф22mm,DN20-ф27mmDN25-ф 34mm,DN32-ф42mm DN40-ф48mm,DN50-ф60mm DN65-ф76(73)mm, DN80-ф89mm DN100-ф114mm,DN125-ф140mm DN150-ф168mm,DN200- ф219mm DN250-ф273mm,DN300-ф324mmDN350-ф360mm,DN400-ф 406mm DN450-ф457mm,DN500-ф508mm DN600-ф610mm, DN15- ф18mm,DN20-ф25mmDN25-ф32mm,DN32-ф38mm DN40-ф45mm,DN50- ф57mm DN65-ф73mm,DN80-ф89mm DN100-ф108mm,DN125-ф133mm DN150-ф 159mm, DN200-