... Rammer CR77R with Robin EH12 engine Technical Specification ModelCR77REngine TypeRobin EH12-2DPower kw(hp)3.0(4.0)Weight kg( ... products: concrete cutter series,edging/walk-behind/ride-on power trowel series,tamping rammer,vibratory truss screed,surface finishing screed ... include concrete cutter series,edging/walk-behind/ride-on power trowel series,vibratory truss screed,surface finishing screed,etc. ...