Double cylinder

double cylinder knitting machine

double cylinder slasher

double cylinder synchronism

double lift double cylinder jacquard

Double Valve

Double valve replacement

double valve shoe

cylinder lock

Cylinder valve

air lock valve

gas lock valve

safety lock valve

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