GB/T 29465  法兰 C-RF 2550-4.0/20δ0=

5 CRF 2550-4.020δ0=

wn300-1500rj505 FM S=12=48RFFFF1 s=66R/0

WN350-16T

SO 25(B)-16 FFf1=4 C=L100(RF Sch404

wn80(b)-40 rf/RF2-10j sch80

47021 cfm 1000-0.625FF70-165056 rf0RF 20615.F40FSch160S

WN 40-300 RF S=12

wn80-40 rfsch21500

47021 CFM 600-1.0c