Feb 122016
 

From Youtube.com: A crane is a kind of machine, normally equipped with a hoist, wire ropes or chains, and sheaves, that could be used both to lift and lower products and to move them flat. It is generally used for raising heavy things and transferring them to various other areas. It uses several easy machines to produce mechanical benefit and thus relocate lots beyond the normal capability of a human. Cranes are commonly employed in the transportation industry for the loading and discharging of products, in the construction market for the movement of products and in the manufacturing market for the putting together of heavy tools.

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