法兰 BL 400(B)-25 Mb4=270 e=5

bl400(b)-25mb4=270 e=5

23 FM500-1.6 δ0=12

SO 350(B)-16 RF B=381

WN50(A)-40 M S=4.50�r2F S=RF D

a wn1000-150 rf undefined= l=

NB/T47021 RF600-0.6 B=346RF5 sch46RFF Sch400mS H=340RF Sch40Sn150-150 rf sch40 s=50F.000-

WN250-600 RF B=

WN600-150 RF Sc