HG/T 20592  法兰盖 BL 100-16 RF HG/50 RF Sch70931355�@RFF@FF-R0M2FF@P2@Fj@5@F St

BL100-16 RF HG/50 RF Sch70931355�@RFF@FF-R0M2FF@P2@Fj@5@F St

WN500-150 RF S=203pqr

LJ 2 1/2"-300 FF

SP-1977

47023 RF600-2.5M

wn 300-150 rf schxs

WN 2"-600 RF S=3.91

PL100B-6RF b=3

WN 150-150 RF

BI 7915ch10S-Fh8040@RF@45-R@4Jam711ch80S@25h