GB/T 12459  弯头 DN 20-Ⅱ-390EL-15075at300rf06-)-

DN 20-Ⅱ-3 90EL-15075at300rf06-)-

BL 200-150 FF

bl80(b)-6RF28h=3000

法兰 PL50(B)-25 RFF0-00000000000000

WN 16"-150 RF Sch40

wn65(b)-100 m s=86RF/ RF S=b80sS=

BL80(B)-160 RFR RF

WN65(B)-25 RFF615F000(2dn.

wn600-600gh8

WN 300-300 RJ Sch8S=516SC