HG/T 20592  法兰 WN 250-25 RF0--0=61.5 R-

WN250-25 RF0--0=61.5 R-

pl50(b)-10 rf-c

BL 400(B)-16 RF S=10

WN 500(A)-10 RF S=7.5

3 CM 1500-2.520δ0200Sch21RF00m/u

WN 500(B)-16 RF S=12

WN150 -100 RFSch40)-061(b)-

WN 10-300 MRFf s M S=5-300

PL 600(B)-6 RF=ch40S/mp6S=94020���@S7RFch0RF00.5 R