HG/T 20592  法兰 PL 250 -25 RF s=9aM�-10Rlehg=Sc sch0

pl250 -25 rf s=9aM�-10Rlehg=Sc sch0

WN25-25 FMh40 RF S50 RF)10R

PL80-6RF AA=28SRFFH10 H=30F-16

PL 200(B)-16 RF4200-

WN 50-63 RJ S=4

BL50-150 RF0/92-20أ¥40 RF

1 RF 500-1.6 δs=6Ⅱ92-200

WN100-150 RF S=3.5=8Frf/ b=3‘в”

BL600-10 RF f61RF520δs