trip - ultr
- twinning growths
- twinning plane
- twinning wisp
- twirl
- twist
- twist drill
- twist joint
- twist-free
- twist-off
- twisted
- twisting
- twisting force
- twisting moment
- twisting stress
- twisty roadway
- twitch
- two lift retreating longwall system
- two-arm caliper
- two-axle scraper
- two-batch truck
- two-bench stripping
- two-blade drag drilling bit
- two-cage
- two-cage hoisting
- two-circle goniometer
- two-compartment gravity incline
- two-compartment slope
- two-component eutectic
- two-cone
- two-cone bit
- two-cone drill bit
- two-cone drilling bit
- two-cone expandable drilling bit
- two-core cable
- two-core logging cable
- two-crown
- two-cutter expandable drilling bit
- two-cylinder drier
- two-day cycle
- two-deck
