NB/T 47023  法兰 T 1700-6.4/20δ0=20=4FF b� s30)-25

3 T 1700-6.420δ0=20=4FF b� s30)-25

wn80(b)-150rf s=4 a=89

WN80(A)-160 M S=956/100-179

wn15(b)-16 rf s=3.5 s305rt-600

20592 WN500(B)-25 RF05=8RFu00=2/

wn50-300rj A=502BB=22H=65Mo2=2c=3

WN40(A)-40 FM S=60-S=c1=200 RF Sch40SF206 WN RF S=146 WN=360-F