GB/T 12459  同心异径管 DN 65×40-4RC151=10/ SS=7.11B)-2

BL150b-16RF100-16rf340quothg20615 wn350-600r2336

DN 65×40-4 RC151=10/ SS=7.11B)-2

wn250(b)-16fmhg/t205920-2.5F-100

BL 500-300 RFrÃch40)-16 RF=65FM02T 2059

2 M 1000-1HGБ(b)N0040 RF S=14F/-

wn350-900 Rj sch40sw RRFRF b=2RFN10

WN600b-40RFS=20S6 RFF30