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发明名称
Ball
摘要
申请公布号
US2257252(A)
申请公布日期
1941.09.30
申请号
US19390282465
申请日期
1939.07.01
申请人
VORBUSCH BENJAMIN R
发明人
VORBUSCH BENJAMIN R.
分类号
A63B37/12;A63B39/06
主分类号
A63B37/12
代理机构
代理人
主权项
地址
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