NB/T 47022  法兰 RF 900-2.5F Sch40

2RF900-2.5F Sch40

BL 100-300 RF Sch40

WN 40(B)-40 RF

WN 65(B)-40 RF

PL 12B25 RF4@WN1-224��B

5 RF 500-4.0 δ0=12

SO 2"-150 RF

WN 1 1/4"-1500 FF

WN150()-16 RFs RF6R Fc

WN 3/4"-2500 RJ S=11.1Sch5-B==3Frv s=11;w-4.5RS5.u00f0CHT40F0A@4