HG/T 20592  法兰盖 BL 250-40 MF5.509 BL0s)-

BL 250-40 MF5.509 BL0s)-

so40-25 rf916Mc

SO 40(B)-40 RF 4/3mm..5 &

PL 400(B)-10 RF r6RF0pa6

WN 2"-150 RF Sch80S350-1.0r

WN65(B)-25M S=4

LWN 100-300 RF B=Rc

WN40-150 RF Sch.80

BL80-300RJ5/b)459(b)0-1.00592- RF440S0f1.5

WN50(B)-40MF.h6 RL45FL-1