HG/T 20592  法兰盖 BL 450-16 GRF1.0.00t8FF70 Sc)-D=2

BL450-16GRF1.0.00t8FF70 Sc)-D=2

bL125(B)-6 RF H1=7F S=4M S=4MS1600-151=301.RF S=7)-6P-1

So65(B)-16FMch40100-175550 f1=301.RF S=7)-6P-1

WN25-150 RFB=49 M0-56 H=GB/0=28

BⅠ 1600-f/F8S δ0=1fm s=10RF03rf6ch401f f1=3-6 rf b=2

WN450-300 RF B=42980-2009