HG/T 20592  法兰盖 BL 80-40 RF5=4.5RF S=4./72=1

BL80-40 RF5=4.5RF S=4./72=1

BL400(A-10RF120T-f-10

pL250(B)-16RF b=10=52s��H=/80 LFM50ch6f IB)

BL400(B)-16 RF5-1M

DN 400-Ⅱ-6 LJS9so S

WN 40(B)-25 M S=4

WN50-25RF(B16R A=

DN 40×40×900-Sch30 TRTR S t H

WN50-150 g8

SO 25(B)-16 RFch=6 δn.20-4p s=