HG/T 20592  法兰 PL 250(B)-25 RF=1600P1h40 S/3r1F RFRF64-S0 S=6h40S

PL250B)-25RF=1600P1h40 S/3r1F RFRF64-S0 S=6h40S

PL20-40 RF6=10 S=.61b)-16

WN250(B)-40 RF S=8 C=5

BL15-300 RF‰-G/T205 b=1F/35h595B=7940 RF--pampquot

PL100(B)-63 RFF12�h40S-1s/37-980font16

WN300(B)-40 FM S=8160-4.0RFA=57F-100g20615-20

bl150-300tw S