HG/T 20615  法兰 WN 250-300 FF2gch0.550(B)-SchFRFN= A=

WN250-300FF2gch0.550(B)-SchFRFN= A=

BL80-300 RF SchS4

BL 40-1500 RJ59=24WN20R d=3=5 D=3

PL400(B)-16 RF D=575 b=7

WN50(B)-25 RF S=60-2.50/TRS=70 RF00900

20592pl500(b)-6rf RJ SRF2 rf3.6-k=m00

so 250(b)-16 fmfnvokerrf010 RF0 RF

WN80(B)-25 M S=6rF

HP-1b