HG/T 20592  法兰盖 BL 50-6 RF0 K=58/

bl50-6rf0 K=58/

WN 300-900 FM S=

wn200-150rf a3/61-N80-

BL 40-300 RFƒ0 R

WN250-600RFSch40A=1

WN40A-63 RF S=7

WN 15(B)-16 RF S=6F20-300 fm0-6.45FM6.3F0A150 RF Sch80d1.6

B WN 700-150 RF S=7

WN 250-150 RF SCH80 RF Sch40RFRFFM S=5=n20-300 fm0-6.45FM6.3F