GB/T 12459  弯头 DN 65-Sch1090EL0a-40rfRF20/FFampampampqu

DN 65-Sch10 90EL0a-40rfRF20/FFampampampqu

a 2600FFF S=5.6n3CM80 rf=6pampampamp1000-1.0/85- RFu0Hr 10F60Rch0.3540

WN20(B)-100 RF/0S RF300 R31S/W0000-0.6100 300-0 δ=300090=1/mpa n1

DN600-PN10 WN RF

WN 3"-300 RF S=8.2

WN50-600RF20 δ1=1/

WN4