Improvements in and relating to the cutting, grinding or other treatment of stone and such like material where ball shot or like abrasive material is employed
摘要
申请公布号
GB383282(A)
申请公布日期
1932.11.09
申请号
GB19310010437
申请日期
1931.04.09
申请人
GEORGE FRANCIS ATYEO;THERESA ATYEO;FREDERICK FRANCIS WILLIAM ATYEO;VINCENT ERNEST ATYEO
