... *28.5CM Shoe size 4.4-8CM Jumping Stroke Tamping Rammer CR77R with Robin EH12 engine Technical Specification ModelCR77REngine TypeRobin EH12-2DPower kw ... cutter series,edging/walk-behind/ride-on power trowel series,tamping rammer,vibratory truss screed,surface finishing screed,scarifying machine,gasoline water ... Fair:2012.10 2.Bauma China:Dec. 27-30,2012 Tamping Rammer CR77R with Robin EH12 engine