HG/T 20592  法兰 WN 200-63 RFRF3==56.6/ -0.6h4016rf b=5 rf scD=203 K

400-WN200(A)-63RFRF3==56.6/ -0.6h4016rf b=5 rf scD=203 K

BL65-2500RJ500-10-1

so500b-16rf b=56rf0EcF B=Φ49.22h30800

bl250-63RFF/6 RF/b)-10/00-1.16

wn125(b)-16fm/41Jrf s/62-1251

3 G 2800-0.2520δ0=10

DN32-PN16 PL RF Ⅱk=5

WN 1800(B)-10 T S=8

pl450-25