HG/T 20592  法兰 SO 500-16 RF-B=50 H=-s/SCmF2=265F Sch40=20³

SO500-16 RF-B=50 H=-s/SCmF2=265F Sch40=20³

WN15(B)-25 M S=

pl80(B)-25RF3ذ؟fb1=35=/100-205=40

wn 40-16 rf f1=3= RC=5FS/1

PL3500(B)-10RF15228861685

LWN 600-300 G Sch140

1 RF 800-1.0 δs=440SFFRFh40Ss=10 ffsC S

BL 20-150 RF50-1 RF6RFS/-1

BI 273

DN40/