A 'control panel' that contains devices required for the operation of 'thyristors'

A timepiece that measures a time interval and signals its end; a time-switch.

A timepiece that measures a time interval and signals its end; a time-switch.

A device that is a mechanical implement for working upon something, as by cutting, striking, rubbing or other processes, in any manual art or industry; usually, one held in and operated by the hand (or fixed in position, as in a lath), but also including certain simple machines, as the lathe; sometimes extended to simple instruments of other kinds.

A device that is a mechanical implement for working upon something, as by cutting, striking, rubbing or other processes, in any manual art or industry; usually, one held in and operated by the hand (or fixed in position, as in a lath), but also including certain simple machines, as the lathe; sometimes extended to simple instruments of other kinds.

A top drive is a mechanical device on a drilling rig that provides clockwise torque to the drill string to facilitate the process of drilling a borehole.

A well drilling system and an artefact in which the motor which turns the drill string is connected to the upper end of the string and moves downwardly with the drill string during the drilling operation.

A fluid coupling intended to allow a smooth start of a driven equipment and then keeping a nearly constant speed.

A fluid coupling intended to allow a smooth start of a driven equipment and then keeping a nearly constant speed.

A tank which is supposed to be transported.

A tank which is supposed to be transported.

A machine designed to deliver a high tractive effort (or torque) at slow speeds, for the purposes of hauling a trailer or machinery

A machine designed to deliver a high tractive effort (or torque) at slow speeds, for the purposes of hauling a trailer or machinery

Is a vehicle which is nonautomotive and is designed to be hauled by road.

Is a vehicle which is nonautomotive and is designed to be hauled by road.

A transformer that, by electromagnetic induction, transforms a system of alternating voltage and current into another system of voltage and current usually of different values and at the same frequency for the purpose of transmitting electrical power.

A transformer that, by electromagnetic induction, transforms a system of alternating voltage and current into another system of voltage and current usually of different values and at the same frequency for the purpose of transmitting electrical power.

A physical object that is an element that receives a process variable signal from a sensor and converts it into an output signal.

A physical object that is an element that receives a process variable signal from a sensor and converts it into an output signal.

A transceiver that transmits a signal automatically in response to an appropriate triggering signal.

A transceiver that transmits a signal automatically in response to an appropriate triggering signal.

A tree cap is a barrier to keep the subsea environment clean in case of any leaks above the annulus or production swab valves. It includes a mechanism to indicate the metal seals have been set within the seal bore of subsea tree.

A tree cap is a barrier to keep the subsea environment clean in case of any leaks above the annulus or production swab valves. It includes a mechanism to indicate the metal seals have been set within the seal bore of subsea tree.

A narrow excavation of considerable length cut into the ground.

A narrow excavation of considerable length cut into the ground.