<p>The invention relates to a golf clubhead (1) made from metal, with a striking face (2) having a loft angle alpha greater than 45 DEG , with several parallel grooves. The above is characterised in that the striking face (2) has a roughness Ra less than 0.25 micrometres and the Vickers hardness of the striking face (2) is greater than 5 gigapascals.</p>
申请公布号
WO03000352(A1)
申请公布日期
2003.01.03
申请号
WO2002IB02296
申请日期
2002.06.20
申请人
ROGER CLEVELAND GOLF COMPANY, INC;ROESGEN, RICHARD, J.;BENNETT, DAVID M.
