HG/T 20592  法兰 WN 80(B)-40 RF S=5 D=165 H=480RFS=5

WN80(B)-40 RF S=5 D=165 H=480RFS=5

WN50(B)-40 RF›78 D=130 BB=40 b=280/5=4

wn20(B)-16MF0RFRF=4.5 RF S=4.5b=3128FF S

20619 wn80-300 RF

WN15-600T010pamp Sc(b)-/SC50rf2-13FM5 b=3 f1=37nFMm)-90FS F

PL125(B)-16 RF D54F1pl20(b)ajRFr/B=3Rr4JSch400RFch1