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A crane is a type of machinery used for lifting and moving heavy materials in construction, transportation (loading and unloading merchandise) and other fields. Most cranes are equipped with a hoist, wire ropes or chains, and sheaves, that can be used both to lift and lower materials and to move them around.

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grue portique

Industrial machinery; Cranes

Semblable à une grue mobile, sauf que le pont pour le transport du chariot ou chariots est rigidement appuyé sur deux ou les jambes plus en cours d'exécution sur rouleaux fixes ou autre piste. Un ...

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