The thorium fuel cycle is a nuclear fuel cycle that uses an isotope of thorium, 232Th, as the fertile material.

The Three Gorges Dam is a hydroelectric gravity dam that spans the Yangtze River by the town of Sandouping, in Yiling District, Yichang, Hubei province, central China, it has been the world's largest power station in terms of installed capacity (22,500 MW) since 2012.

Three-phase electric power is a common method of alternating current electric power generation, transmission, and distribution.

The value of input to a measuring instrument, or any system, below which no output change can be detected.

In particle physics, the threshold energy for production of a particle is the minimum kinetic energy a pair of traveling particles must have when they collide.

The threshold limit value (TLV) of a chemical substance is believed to be a level to which a worker can be exposed day after day for a working lifetime without adverse effects.

The time-weighed average concentration of a substance to which workers may be repeatedly exposed, without adverse effect.

Actual throat, the shortest distance between the weld root and the face of a fillet weld.

A throttle is the mechanism by which fluid flow is managed by constriction or obstruction.

A bearing located inside the ship to transmit the propeller thrust from the shafting to the hull structure.

The complete assembly of thrust shaft and bearings which is solidly constructed and mounted onto a rigid seating.

The product of the propeller thrust and speed of vessel advance.

A short length of shaft with flanges at either end and a thrust collar in the centre.

All components and systems necessary to supply the DP system with thrust force and thruster direction.

Thrusters are used to allow ships to be more independent from tugs, give them more manoeuvrability for special tasks, and in some cases give them a “take home” capability.

A thunderstorm, also known as an electrical storm or a lightning storm, is a storm characterized by the presence of lightning[1] and its acoustic effect on the Earth's atmosphere, known as thunder.

A solid-state semiconductor device with four layers of alternating P- and N-type materials.

Thyristor-controlled reactors can be used for limiting voltage rises on lightly loaded transmission lines.

A thyristor-switched capacitor is a type of equipment used for compensating reactive power in electrical power systems.

A tidal barrage is a dam-like structure used to capture the energy from masses of water moving in and out of a bay or river due to tidal forces.