Diving bell-double vent
furnace top with double-bell
bell chime steam whistle
chime bell music and choreography
“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