A physical object that is intended to bring air to a specified quality.

A direct current power supply unit for charging batteries.

A conveyor that consists of a suitably tensioned endless belt made from hard wearing materials and arranged to run over rollers.

A conveyor in which endless chains are used to support slats, apron, pans, buckets, as distinct from the use of single band.

A starter in which the force for closing the main contacts is provided exclusively by electrical energy.

A conveyor comprising a series of closely spaced rollers set so that their crests can support articles to be conveyed. They may be power-driven, or freely revolving. Tapered rollers are used to form bends in the conveyor line.

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.