Lifting jacks and pumps, all included in Class 7; pre-stressing beds and stessing units, vibration beds and curing beds, all for use in the production of pre-cast concrete fabrications; motors (not for land vehicle propulsion); machines for use in mixing and setting of concrete and of colloidal mixes; machinery for vibrating and pre-stressing concrete in moulds and in forms; screeding machines and screeding apparatus included in Class 7; power operated machines and power operated apparatus, all for use in vibrating and compacting concrete masses and for compacting surfaces of building areas; power operated cutting machines incorporating annealing devices; power operated hand held tools, and flexible drives and grinding attachments for use therewith; power operated presses and hand operated presses, none being for printing.;