NB/T 47023  法兰 FM 1400-6.4/20δ0=18

3 FM 1400-6.420δ0=18

SO25(B)-16 RFF S=7

WN 300(A)-16 RF S=4.5t 20F50 RF S=6��d=ch160400 K=13

WN250(B)-40 FF S=11.516 RFa/ b=5

WN600-300 RFj0Sch40

WN 40-600 T Sch80=/0

WN100(B)-16 TG S=6F S=6¬â€

PL200B-6RF f1=3(B)-6 RFf4.0/fo00m8B)f11=4.

B