GB/T 12459  弯头 DN 300-Sch1090EL40/

DN 300-Sch10 90EL40/

WN 32(B)-25 RF S=581rf RF1F0SRF

5 M 700-6.4 δ0=16

WN8(B)-10 RF S=5п©б╘п

wn80-25rf a=890-4.0smnii48»Â592RF S=3-1.0/

PL600(B)-16RF6RF00-15=3.11

BL 125-6 RF R00-0.66RF-ch10S4 S=8 sch

wn100(b)-25ms=4.5R2n b=3F-1/F1

PL 125(