HG/T 20592  法兰盖 BL 800-40 RF145 1800D=273 b=

BL 800-40 RF145 1800D=273 b=

WN20-300 FF2-/h4F/���rc�15schB)-16 R

WN15-900 RF Sch432D0h40S-16 R0-1.66.

WN100-150RFSch/ RFpaF��FFRFRF Sch80S85RF Sch120=6

pl15-25 rf=1650500 M10 fm

PL50-16rf b=3

DN150-PN6 WN RF S=3.5

pl65b-16 rf 三ampamp;