| T051 | TG | Turbine Generator | Generator driven by a turbine | Power plants for electricity generation |
| T052 | TGA | Thermal Gradient Analysis | Study of temperature variation in a component | Furnace walls or turbine blades |
| T053 | TGB | Torque Gear Box | Gearbox transmitting torque from motor to load | Automotive drivetrains |
| T054 | TGC | Temperature Gradient Coefficient | Material property indicating thermal response | Expansion analysis of metals |
| T055 | TGD | Turbine Guide Device | Device guiding fluid in turbines | Steam turbine guide vanes |
| T056 | TGE | Thermal Gas Expansion | Gas expansion due to heat | Combustion engine cylinders |
| T057 | TGF | Torque Gear Force | Force transmitted through gears | Gear trains in machinery |
| T058 | TGG | Torsion Gear Gauge | Measuring torsional stress on gears | Gear fatigue testing |
| T059 | TGH | Thermal Gradient Heat | Heat associated with temperature gradient | Heat exchangers |
| T060 | TGI | Turbine Gear Inspection | Inspection of turbine gears | Maintenance in power plants |
| T061 | TGJ | Torsion Gear Joint | Joint designed for torsion transfer | Industrial gear couplings |
| T062 | TGK | Torque Gear Key | Key securing gears on shaft | Automotive transmissions |
| T063 | TGL | Thermal Gradient Limit | Maximum allowable temperature gradient | Turbine blade design |
| T064 | TGM | Thermal Gradient Measurement | Measurement of temperature changes | Engine cylinder analysis |
| T065 | TGN | Torque Gear Nut | Nut securing gear to shaft | Industrial gearbox assemblies |
| T066 | TGO | Thermal Gear Optimization | Optimization of gear design for thermal performance | High-speed gear design |
| T067 | TGP | Thermal Gradient Profiling | Profiling temperature across component | Furnace or reactor walls |
| T068 | TGR | Turbine Gear Ratio | Gear ratio in turbines | Steam turbine speed control |
| T069 | TGS | Thermal Gradient Sensor | Sensor measuring temperature gradient | Heat exchanger monitoring |
| T070 | TGT | Torque Gear Torque | Torque transmitted via gear | Automotive drive systems |
| T071 | TGU | Turbine Gear Unit | Complete turbine gear assembly | Hydroelectric plants |
| T072 | TGV | Turbine Gas Valve | Valve controlling gas flow in turbine | Gas turbine engines |
| T073 | TGW | Torque Gear Wheel | Gear wheel transmitting torque | Conveyor drives |
| T074 | TGX | Thermal Gradient Index | Index quantifying temperature variation | Material testing |
| T075 | TH | Torque Hammer | Tool measuring torque | Engine assembly testing |
| T076 | THA | Thermal Hydraulic Analysis | Study of combined heat and fluid flow | Cooling systems in power plants |
| T077 | THB | Torsion Hinge Bolt | Bolt designed for hinge under torsion | Mechanical linkages |
| T078 | THC | Thermo-Hygrometric Control | Controlling temperature and humidity | HVAC systems |
| T079 | THD | Total Harmonic Distortion | Measure of waveform distortion | Electrical motor drives |
| T080 | THE | Thermal Heat Exchanger | Device transferring heat between fluids | HVAC and power plants |
| T081 | THF | Torsional Harmonic Frequency | Frequency of torsional vibration | Shaft dynamics in engines |
| T082 | THG | Thermal Heat Gradient | Temperature variation in components | Heat-treated metals |
| T083 | THH | Torque Hydraulic Head | Head pressure associated with hydraulic torque | Pumps and turbines |
| T084 | THI | Thermal Heat Insulation | Material or method reducing heat transfer | Furnace linings |
| T085 | THJ | Torsion Hinge Joint | Joint allowing rotation under torque | Robotic arm assemblies |
| T086 | THK | Thickness | Material thickness | Sheet metal fabrication |
| T087 | THL | Thermal Heat Load | Heat energy applied to system | Industrial ovens |
| T088 | THM | Torque Hydraulics Mechanism | Mechanism transmitting torque using hydraulic power | Hydraulic presses |
| T089 | THN | Thermal Heat Network | Network for distributing heat | Building heating systems |
| T090 | THO | Thermal Heat Optimization | Improving heat transfer efficiency | Heat exchanger design |
| T091 | THP | Thermal Hydraulic Pressure | Pressure in fluid due to thermal effects | Boilers and turbines |
| T092 | THR | Torque Hydraulic Ratio | Ratio of torque to hydraulic pressure | Hydraulic motor design |
| T093 | THS | Thermal Heat Sensor | Sensor detecting temperature changes | Industrial process monitoring |
| T094 | THT | Thermal Heat Transfer | Transfer of heat energy | Heat exchangers, engines |
| T095 | THU | Torque Hydraulic Unit | Unit transmitting torque via hydraulics | Hydraulic drive systems |
| T096 | THV | Thermal Heat Valve | Valve controlling heat flow | Heating circuits |
| T097 | THW | Thermal Heat Washer | Washer exposed to high temperature | Furnace doors or flanges |
| T098 | THX | Thermal Heat Index X | Experimental index measuring heat impact | Material fatigue testing |
| T099 | TI | Torque Indicator | Device showing torque value | Wrenches with torque measurement |
| T100 | TIA | Thermal Imaging Analysis | Analysis using infrared imaging | Detecting heat loss in engines |
| T101 | TIB | Torsion Indicator Bolt | Bolt indicating torsion load | Engine crankshaft assembly |
| T102 | TIC | Thermal Insulation Coefficient | Coefficient describing insulation effectiveness | Furnace linings |
| T103 | TID | Torque Indicator Device | Device measuring applied torque | Automotive assembly QA |
| T104 | TIE | Tension Indicator Equipment | Equipment measuring tensile load | Material testing |
| T105 | TIF | Thermal Insulation Foam | Foam used to reduce heat transfer | Industrial piping insulation |
| T106 | TIG | Tungsten Inert Gas | Welding process using inert gas and tungsten | Welding stainless steel |
| T107 | TIH | Torque Indicator Handle | Handle integrated with torque measurement | Manual torque wrenches |
| T108 | TII | Thermal Imaging Instrument | Device capturing thermal images | Electrical and mechanical diagnostics |
| T109 | TIJ | Torque Indicator Joint | Joint monitored for torque | Shaft couplings in machinery |
| T110 | TIK | Torque Indicator Key | Key measuring torque in assemblies | Drive shaft assemblies |
| T111 | TIL | Thermal Insulation Layer | Layer preventing heat loss | Boiler and furnace insulation |
| T112 | TIM | Torque Indicator Module | Module measuring torque | Motor test benches |
| T113 | TIN | Thermal Insulation Network | Network of insulation layers | Pipeline systems |
| T114 | TIO | Thermal Inspection Optics | Optical system for thermal inspection | Infrared cameras in factories |
| T115 | TIP | Torque Indicator Plate | Plate measuring torque distribution | Gear assemblies |
| T116 | TIR | Thermal Infrared Radiation | Radiation emitted due to temperature | Heat loss detection |
| T117 | TIS | Thermal Insulation System | System reducing heat transfer | Industrial furnaces |
| T118 | TIT | Turbine Inlet Temperature | Temperature of fluid entering turbine | Gas turbines |
| T119 | TIU | Thermal Insulation Unit | Unit of insulation applied | Boiler walls |
| T120 | TIV | Thermal Isolation Valve | Valve isolating thermal flow | HVAC systems |
| T121 | TIW | Thermal Insulation Washer | Washer preventing heat transfer | Hot surface machinery |
| T122 | TJ | Torsion Joint | Joint transmitting torque | Robotic arms or shafts |
| T123 | TJA | Torsion Joint Assembly | Assembly of torsion joint components | Drive shaft assemblies |
| T124 | TJB | Torsion Joint Bolt | Bolt used in torsion joint | Industrial machinery |
| T125 | TJC | Torsion Joint Coupling | Coupling allowing torsional motion | Automotive drive shafts |
| T126 | TJD | Torsion Joint Design | Design parameters for torsion joints | Shaft assemblies |
| T127 | TJE | Torsion Joint Evaluation | Quality assessment of torsion joints | Mechanical QA labs |
| T128 | TJF | Torsion Joint Fixture | Fixture for assembling torsion joint | Robotic arm manufacturing |
| T129 | TJG | Torsion Joint Guide | Guide for torsion joint motion | Machinery linkages |
| T130 | TJH | Torsion Joint Hub | Hub connecting torsion joint | Gearbox shafts |
| T131 | TJI | Torque Joint Indicator | Measurement of torque in joint | Shaft coupling QA |
| T132 | TJJ | Torsion Joint Journal | Journal for torsion joint | Vehicle suspension components |
| T133 | TJK | Torque Joint Key | Key connecting joint and shaft | Conveyor drive shafts |
| T134 | TJL | Torque Joint Load | Load transmitted through torsion joint | Industrial presses |
| T135 | TJM | Torque Joint Module | Modular torsion joint assembly | Robotic applications |
| T136 | TJN | Torque Joint Nut | Nut securing torsion joint | Gear assemblies |
| T137 | TJO | Torque Joint Optimization | Optimizing torsion joint performance | Automotive suspension |
| T138 | TJP | Torsion Joint Plate | Plate in torsion joint assembly | Structural machinery components |
| T139 | TJQ | Torque Joint Quality | Quality index for torsion joint | QA testing |
| T140 | TJR | Torque Joint Rod | Rod transmitting torque | Mechanical linkages |
| T141 | TJS | Torsion Joint System | Complete torsion joint assembly | Industrial machinery |
| T142 | TJT | Torque Joint Torque | Torque transmitted via joint | Robotic drives |
| T143 | TJU | Torque Joint Unit | Unit consisting of torsion joint | Conveyor assemblies |
| T144 | TJV | Torsion Joint Valve | Valve integrated with joint motion | Hydraulic actuators |
| T145 | TJW | Torque Joint Washer | Washer in torsion joint | Reduces wear |
| T146 | TJX | Torque Joint Index | Index measuring torsion joint stress | Material testing |
| T147 | TK | Torque | Rotational force applied to a shaft or joint | Wrenching a bolt |
| T148 | TKA | Torque Key Assembly | Assembly using key to transmit torque | Gearbox drives |
| T149 | TKB | Torque Kinetics Bolt | Bolt experiencing torque load | Engine assembly |
| T150 | TKC | Torque Kinematic Coupling | Coupling transferring torque with controlled motion | Robotic actuators |
| T151 | TKD | Torque Kinetics Design | Design of components under torque | Gear shafts |
| T152 | TKE | Turbine Kinetic Energy | Energy of rotating turbine blades | Hydroelectric turbines |
| T153 | TKF | Torque Kinetics Fixture | Fixture for torque testing | Machine QA labs |
| T154 | TKG | Torque Kinematics Gauge | Gauge measuring torque motion | Rotating shafts |
| T155 | TKH | Torque Key Hub | Hub connecting torque key | Drive shafts |
| T156 | TKI | Torque Kinetics Instrument | Instrument measuring torque | Motor test rigs |
| T157 | TKJ | Torque Kinetics Joint | Joint transferring torque | Robotic arms |
| T158 | TKK | Torque Key Keeper | Device securing key for torque | Gear shafts |
| T159 | TKL | Torque Key Lock | Lock for torque key assembly | Motor assemblies |
| T160 | TKM | Torque Kinetics Module | Modular unit for torque testing | Mechanical labs |
| T161 | TKN | Torque Key Nut | Nut securing torque key | Gearbox assembly |
| T162 | TKO | Torque Key Optimization | Optimization of key and shaft for torque | Automotive drives |
| T163 | TKP | Torque Key Plate | Plate supporting torque key | Industrial machinery |
| T164 | TKQ | Torque Key Quality | Quality index for torque key | QA testing |
| T165 | TKR | Torque Key Rod | Rod used in torque transmission | Conveyor shafts |
| T166 | TKS | Torque Key System | Complete torque key assembly | Gearbox drives |
| T167 | TKT | Torque Key Torque | Torque transmitted via key | Mechanical linkages |
| T168 | TKU | Torque Key Unit | Unit including key and shaft | Conveyor drives |
| T169 | TKV | Torque Key Valve | Valve integrated with torque key | Hydraulic actuators |
| T170 | TKW | Torque Key Washer | Washer supporting torque key | Reduces wear |
| T171 | TKX | Torque Key Index | Index measuring torque key performance | QA testing |
| T172 | TL | Tolerance Limit | Maximum permissible deviation | Machined shaft diameter |
| T173 | TLA | Thermal Load Analysis | Study of heat applied to components | Engine cooling system |
| T174 | TLB | Torsion Load Bearing | Bearing designed for torsional load | Drive shafts |
| T175 | TLC | Tool Life Cycle | Expected lifespan of a cutting tool | Lathe and milling tools |
| T176 | TLD | Thermal Load Distribution | Distribution of heat across component | Furnace wall design |
| T177 | TLE | Transmission Line Efficiency | Efficiency of power transmission lines | Motors and generators |
| T178 | TLF | Torsion Load Factor | Factor for torsional stress | Shaft design calculations |
| T179 | TLG | Thermal Load Gradient | Gradient of thermal energy | Heat exchangers |
| T180 | TLH | Torque Load Hub | Hub transmitting torque | Gearbox shafts |
| T181 | TLI | Thermal Load Index | Index of heat exposure | Material testing |
| T182 | TLJ | Torque Load Joint | Joint carrying torque | Robotic arm joints |
| T183 | TLK | Torque Lock | Locking mechanism for torque transmission | Gear assemblies |
| T184 | TLL | Thermal Load Limit | Maximum heat allowed | Engine components |
| T185 | TLM | Thermal Load Monitoring | Monitoring heat exposure | Industrial furnaces |
| T186 | TLN | Torsion Load Nut | Nut designed to handle torque | Mechanical linkages |
| T187 | TLO | Thermal Load Optimization | Optimizing heat distribution | Engine block design |
| T188 | TLP | Thermal Load Plate | Plate exposed to heat | Furnace plates |
| T189 | TLR | Thermal Load Resistance | Resistance to heat | High-temperature alloys |
| T190 | TLS | Torque Load Sensor | Sensor measuring applied torque | Assembly QA |
| T191 | TLT | Torque Load Test | Test to measure torque load capacity | Engine shafts |
| T192 | TLU | Torque Load Unit | Unit transmitting torque | Conveyor drives |
| T193 | TLV | Torque Limit Valve | Valve regulating torque load | Hydraulic drives |
| T194 | TLW | Thermal Load Washer | Washer exposed to heat | High-temperature machinery |
| T195 | TLX | Thermal Load Index X | Experimental thermal load index | Material fatigue studies |
| T196 | TM | Torque Measurement | Measurement of applied torque | Wrenches and sensors |
| T197 | TMA | Thermal Mechanical Analysis | Combined thermal and mechanical analysis | Engine component testing |
| T198 | TMB | Torque Measurement Bolt | Bolt for measuring torque | Assembly QA |
| T199 | TMC | Thermal Management Control | Controlling heat in systems | Electronics cooling systems |
| T200 | TMD | Torsional Mechanical Design | Design for torsional strength | Drive shafts, robotic joints |