HG/T 20592  法兰盖 BL 500-25 RF=12=80/-1

21521bl500-25rf=12=80/-1

NB/T47023 FM450-2.5

BL50(B)-16RF.1 f1=1.40rf40s/S=10 &quo S

wn200-300 RF Sch.5/s+10h40Â

HG/T9119-2010 PL 32(B)-16RF

WN50-300 G Sch40 S/1.06

WN 40-150 RF006в00 RF�

BII 1000 h=300 l100-6.4/17=60 C=0S0rf700S=8=4أ¯طںآ½