disk - down
- double cluster
- double coil spring lock washer
- double column
- double contact
- double crank mechanism
- double curved surface
- double cut
- double cutting
- double D tooling
- double doping method
- double duplex milling machine
- double end stud with full shank
- double ender
- double flank inspection station
- double flare
- double gear
- double grip
- double gripper
- double hand
- double helical staggered teeth
- double indexing
- double knurling
- double lathe
- double lock
- double nose
- double nozzle
- double nut
- double overarm
- double pair meshing
- double pass
- double pilot-type line reamer
- double portal cutting machine
- double precision
- double ramshorn
- double reduction gearmotor
- double riveting
- double rocker mechanism
- double scale
- double shaper
- double sliding spindle
