double velocity fan

Double-velocity Stage

High-velocity doublechamber bed

constant-velocity (or double) universal joint

Piston Wind Velocity in Tunnel with Double Shafts

double double iron

“double-seat double-vote” system

ball mill with double-inlet and double outlet

cationic double-chamber double-layer float bed

COAL PULVERIZER WITH DOUBLE INLET AND DOUBLE OUTLET

double blind double dummy

Double blind double dummy randomized controlled clinical trial

double bus bar with double sectionalized bus bars

Double Busbar and Double Segment

Double Chambers and Double Layers

Double chambers double layers floating bed

double column and double FID

Double columns and double FIDs

Double Connecting Rods and Double Crankshafts