GB/T 12459  弯头 DN 40-390EL20090R0-2F0(b)-25 rf--160fFRF81d

DN 40-3 90EL20090R0-2F0(b)-25 rf--160fFRF81d

WN 1/2"-300 RF S=6.0/42-h30��0mpamp-4.0T7

WN 50B-100 FM6RF156MbF000

SO 2"-150 RF

wn200-16ff/ch405R-p0SSCHS0RFrjF404rf pn00 RJ.5c

wn150(B)-25GCr17292-11 RF Sch1F6+ampampampampquo-50 RF Sch160=