GB/T 12459  弯头 DN 50-490E3DF bFF SLRF.080-RF

DN 50-4 90E3DF bFF SLRF.080-RF

47023 M2300-2.50R25(F

法兰WN150-300 RFFRFF20F6ampam3 �F6FFd50a-150RF�@.rf60/@-R

PL125-10RF D=330 AA

PL50-10 RF6 RF S=2)

PL50B-16RF C=18 L=33F3.6FSch60M53M6RF0(B700-

wn15(a)-25 mRFR

WN 2"-150 RF Sch40S S=4

WN