double cylinder knitting machine
double cylinder slasher
double cylinder synchronism
double lift double cylinder jacquard
Double valve replacement
Cylinder valve
气瓶阀
气瓶阀门
气缸气门
筒形阀
圆筒伐
容器阀
筒阀
气阀
缸阀
圆筒阀
汽缸阀
double blind double dummy
Double blind double dummy randomized controlled clinical trial
Double Chambers and Double Layers
Double chambers double layers floating bed
Double columns and double FIDs
Double frequency pulsation double vertical ring high gradient magnetic separator
double -peak double -wavelength method