diff - doub
- difference
- difference equation
- difference in pressure
- difference of potential
- differential
- differential block
- differential brake
- differential case
- differential corss shaft
- differential cross
- differential equation
- differential geometry
- differential housing
- differential indexing
- differential indexing head
- differential lock
- differential manometer
- differential motion
- differential pinion
- differential piston
- differential pressure
- differential pressure gage
- differential pulley
- differential screw
- differential shaft
- differential side gear
- differential spider
- differential thermal analysis
- differential thermocouple
- differential transformer
- difficult to machine material
- diffraction
- diffractometer
- diffuse radiation
- diffuser
- diffusion
- diffusion annealing
- diffusion combustion
- diffusion pump
- diffusion velocity
