NB/T 47021  法兰 FM 1800-0.25

1-FM 1800-0.25

DN500-PN6 PL RF Ⅱ

SO100-150 RF

jwn25*50-150 rf

B WN 750-150 RF S=13

WN 40B-63 RFBS-RF�pa

WN 4"-150 RF Sch10S

pl65(b)-16 rf b= b1=ãƒÃFI015rfs=83.6c›–pl700(b)-2 =1

WN50-150 RFSch3.JR0 31ss60005

B WN 750-150 RF Sch40Sf=10