HG/T 20592  法兰盖 BL 800-16 RF23FFRF Sssch40sfS=8B)-s25Sch

BL800-16RF23FFRF Sssch40sfS=8B)-s25Sch

1 RF 600-1.025@ 865/50-56

BL450-150 RF2.5/1

LWN50-300 RF/fo/5.54 H1=≥7=42 S=.045mrf81=4.5-10

wn80-600rjsch4ƒJ RF RF-25RF RF25RF=52=

bl150-600RF Sch40/HF0ES δ0=60 r1

BL500-16RF5F ,HGH41wRF-Sch40ch802

wn50-300