GB/T 29465  法兰 RF 800-0.25 δ0=10

5 RF 800-0.25 δ0=10

DN125-Class150 WN RF Sch40

WN 15(B)-10 RF S=4

WN 450-600RF0 RF Sch400F-90.0r.9266hF000000f1206F Sch4

bi1200_s ãžWN 50-150RF

SO350-150 RF rf0-1.6(a)-16rfR

pl200-10ff1=12S7021/

DN100-PN16 PL RF Ⅱ0077.7-2F0F180

wn65(b)-40 rf s=