GB/T 12459  弯头 DN 20-290EL=4.5(-1-0000-16 RF/66-0 rf d=102

DN 20-2 90EL=4.5(-1-0000-16 RF/66-0 rf d=102

47021 FM550-1.0 δ=52 FFFF HG/2.s

wn32-40 gï¼F/2.s

BL 50-1500 RJmpam

47021 FM550-1.0 δ=52

WN300B-10M34=812Mo2= 2600= K= n=2f sch41m450-4.01000-

WN80B-16RFch40l 32009-FS=5Ls-s/Φ168 FF C=40n

SO125-3