trea - ultr
- treacherous
- tread footprint
- tread pattern
- tread thickness
- tread width
- treatment
- treatment of nuclear war casualties
- tree circuit
- tree diagram
- tree jumping kit
- trench
- trench board
- trench excavator
- trench line
- trench periscope
- trench shelter
- trench shoring
- trepan chisel
- trestle
- trestle apron fence
- trestle bridge
- trestle unit
- tri camera mount
- tri n butylborane
- tri propellant system
- triacetin
- triad
- trial model
- trial operation
- trial period for the suspension of underground tests
- trial target
- trial trip
- triangle of errors
- triangular injection laser
- triangular laser
- triangular lifting surface
- triangular panel
- triangular pulse
- triangular spade
- triangulation
