NB/T 47021  法兰 RF 450-1

47021 -RF450-1

BL 200(B)-150 RFfMSFlRF0RF 3 S4h80s(b

WN 4"-150 RF Sch10S8=6S=3=387D40

BL25-150 RF RFF66R

B WN 54"-150 RF B=SCH4

47065.3 C1pampnb0MF

wn100-300 rj hg/t206155600rf.5.6fR250S30

47023 RF600-4.0RF.a

SO 40-150 RF0 MRFRF.4145B)-16RF