HG/T 20592  法兰盖 BL 300-63 FM50RF S20- m400600.

bl300-63fm50RF S20- m400600.

SO 2 1/2"-150 RFpampampampampampampa

WN500(B)-40RF S=16200-

3fm700-1.6

so40(b)-150ff

3 RF 2800-4.020Jpam

SO 500(B)-16RF

BL15-300RF60/S

WN140-25RF

wn125(b)-25 rf s=sp16g78 S1=800 rjFt0a1S=66s=F0 S/12.5/er RF5HRm0-165s