GB/T 12459  弯头 DN 20-Sch40S90EL3/1/u0

DN 20-Sch40S 90EL3/1/u0

PL20(B)-10RFG/T2061�°bFr0SSFF SC6-@40Hh40/s@FF0SSF

47023 rf2500-1.6 δ=ampampampampampam

PL350-16 RFB)HS=3.5ch80

BL200-2500 RJ59210024sch/

pl50(B)-16 rFRF6RdatK

WN 80-150 RF A=50ampamp

BL15-25RF0-=1

WN 50-1500 RJ B=42

WN 35