The side of a piston pressed against the cylinder wall during the combustion stroke. The opposite side to the connecting rod direction of travel.

A plate that applies thrust (force).

Plates used to apply thrust (pushing force) to another component.

A silicon controlled rectifier used as a switching device using a very low control current to switch much larger currents. Thyristors are switched on by a gate control current and remain on until the main current flow ceases.