HG/T 20592  法兰 PL 20-16 RF50RF40=(

PL20-16 RF50RF40=(

BI 500 H=-2A50M450-4.t/in2

pl400 -16rf/-0F/1

SP-8 δ=1500-2.5F10400-63RF0-

SW40-63 rJ414101--200bc/u0150RF0-1.6/25

PL159B-16RF b=3 C=12 B=1

PL500-10RFGrfcm4.5S=6R0h40406 Rhbsampam

WN 50-16 RF)-16 RF.0F-25 R

BL600-10 rf RFRF1.)-2F S