A positive displacement pump that consists of a chamber containing gears, cams, screws, vanes, plungers or similar elements actuated by relative rotation of the drive shaft or casing and which has no separate inlet and outlet valves.

A system that provides voice and telefax communication via satellites.

Is a conveyer intended to move dry, solid material from one location to another by means of a helix or screw rotating in a cylindrical conduit.

A conveyor consisting of a series of slats generally made of metal or wood attached to an endless chain.

Is a sterilizer intended to make use of ultraviolet light.

A ventilator is a machine designed to mechanically move breathable air into and out of the lungs, to provide the mechanism of breathing for a patient who is physically unable to breathe, or breathing insufficiently.

A regulator designed to automatically maintain a constant voltage level.

A power transformer of which the magnetic circuit and windings are immersed in oil.