HG/T 20592  法兰 WN 250-16 RF SchF=300 sch80/

WN250-16RF SchF=300 sch80/

BI 1000-S/F5F3.5.4 A-300RF S

WN20(B)-160FFF HG Ab=824 c

SO 300(B)-16 RF/5.5RF5ampampBrRFamp;amp;6

WN 40-150 RF Sch80)-1-2 8.6RF S0RF bh313 s=6)60

BL20-63RFR250Ft)

47023 g2000-2.55 S= b=108400b01f8R2

SO 25(B)-10 RF0rj&q

b