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发明名称
Batting practice device
摘要
申请公布号
US2818255(A)
申请公布日期
1957.12.31
申请号
US19550543204
申请日期
1955.10.27
申请人
PONZA LORENZO J
发明人
PONZA LORENZO J.
分类号
A63B69/00
主分类号
A63B69/00
代理机构
代理人
主权项
地址
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