HG/T 20592  法兰盖 BL 350-40 RF200rf-1.B)-m= k= l= n

BL350-40rf200rf-1.B)-m= k= l= n

BL20-150 RF

PL100(B)-25 RF b=40S/u&@4SOF6)-40 RF S=6 RF-800-10=6S=60 G49M400-1.6

47023 FM2300-1./30)-25RF150¤ÂUSF500501 RF.03RJ160 FM s=4050��77.5 RJRF9119€Â/δ=40-

法兰 so 100-150 rf/ S=

pl300(b)-6rf b