HG/T 20592  法兰盖 BL 50-40 RFRFf548b=4 f1=4=8 b=0

so500-150 rf sch RC(A)-16 RF D=F SCH4d=158M S0=40F8N7�

BL50(A)-40RFRFf548b=4 f1=4=8 b=0

WN 32(B)-40 MFMS=5D=33-6. s=10 RFI

PL40-6FFRF0c.5umpam

SO 15-150 RF09nWN80-

WN150(B)-40 M S

ASTM A182M CLASS 150 S5 304 3/

pl65B-16RF-1 RFR0-R)-150RF sch10RF91