关于dn300的pvc管外径是多少的信息

d混凝土管公称直径ф无缝钢管公称直径,其规格为,如ф100108×4DN15ф22mm,DN20ф27mm,DN25ф34mm,DN32ф42mmDN40ф48mm,DN50ф60mm,DN65ф7673mm,DN80ф89mmDN100ф114mm,DN125ф140mm,DN150ф168mm,...