HG/T 20592  法兰 WN 20-16 RF B=25 S=2 A=250 RF Sch4F/0�3ز–ز،ذ“زœذ’آ/0

WN 20-16 RF B=25 S=2 A=250 RF Sch4F/0�3ز–ز،ذ“زœذ’آ/0

WN 500-16 RF S=20-s/@Rf sc/144-250S/60 R

WN25-16FMS=3.50rf l=26

wn350b-25 rf00-4./8-1J Sch160L 6

BL40-10FFf RFH/44s RF SCF3.38.6.cB)=78 Scf00-14

PL 400(B)-10 RF36 R

WN 150(A)-63 RF2