Elevator is a device for raising and lowering loads on a multi- storeybuilding. This tool uses a set of mechanical tools both accompanied by automatic or manual tools, which work with the help of rela...

Hammer mill is a machine that is used to break or crush materials in the form of small pieces. The basic design of this type of machine involves a rotating shaft attached to a freely swinging hammer....

Sewage sludge is primarily derived from waste water which also consists of a variety of other substances. Prior to drying the sludge, free water is removed by mechanical means such as a belt press or...