GB/T 29465  法兰 FF 2850-0.25/20=6.

5 FF 2850-0.2520=6.

LWN25-300RF B=21.1,H=175 HG/T09pl80

LWN 150-150 RF B=1006 RF.html12 d=7chh.foru33ch30/67-0.6

PL 500-10rf8M.256

PL300(B)-6 RFRF50-pampampa0(B)-16 RFr=6 b=620

PL 50(B)-40 RF K=145 d=102 C=30 D=195 L=26

wn25-150 rfsch160s=57b)-

WN700