GB/T 12459  弯头 DN 40-3.545EL=

DN 40-3.5 45EL=

PL 250(B)-40 RF

PL 20(A)-16 RF

LWN50-600RJ h18

WN 200-300 RF S=9

WN 500(B)-16 RF

3 CFM 1800-0.6 δ0=10

PL125(A)-16RF

WN200B-16RF

WN000-150RF.60-RF Sch40so40(b)-16 rf l=105C2=12 Ш=51A16 RF60 ra5 RJ0SM0 RF/ dRF@AMFF Sc-16 RF S=4 C=14