GB/T 12459  弯头 DN 20-Sch1090EL/=/05

DN 20-Sch10 90EL/=/05

wn150-150rf h1=1

WN65(B)-25Mδ=68ampampampam1��F0

WN 15(B)-100 RF

wN100B-25RFRFF.520F28ampaO150-30

PL125-16RF

WN300(B)-300RF)-16 r

PL100(B)-25 RF B1=103-10rf4 sch8

PL 25(B)-40 RF b=

PL 10(B)-2.5 RF=4.F40F Sch805150fBh40 SchN