- boiler
- camshaft
- chuck
- collar
- console
- cylinder
- decompress
- diggings
- drag
- engagement
- engine
- engineer
- engineer
- engineering
- exhaust
- hydraulics
- lubricant
- lubricate
- metal fatigue
- performance
- pipe fitter
- pipeline
- piston
- plunger
- regulator
- rig
- rivet
- rotary
- safety valve
- separator
- shaft
- shockproof
- sparking plug
- spark plug
- spindle
- starter
- streamline
- theodolite
- torsion
- truss
- tune
- tune-up
- tunnel
- turboprop
- wind tunnel
