GB/T 12459  弯头 DN 20-545EL

DN 20-5 45EL

23 FM650-1.0/66-

WN100(B)-160MFS=8

B WN900-2.5RF

BI 1600 l=80 RF Sch80S H/.htmlS0-16R70-140c

pl32-6rf

20592SO500(B)-10M=55δ1=13pampampampampampampampampampam

bl32-300rf269/20ampamp RF==1/1b= C/F6 RF Рҝ

wn20(B)-63rf RF1000-s/

SW 50-3