HG/T 20592  法兰盖 BL 300-10 FFFRFM1T0f s=3.9

BL300-10FFFRFM1T0f s=3.9

WN 10-40 Mf1.00

wn80(a)-16rf s=5.)-25rfN706/54-137FcM5-2.51.6/50-105f146-2.5/-150rf

BL 150(B)-63 M/п©б�

ABL900-600RF2

NB/T47021 C RF 1000-0.61.

WN 250(B)-16 M0-300

WN 50-300 RF S=0/140m

BL 200-2500 RF FF1500-0. s=6

PL40