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发明名称
Mechanical baseball pitching machines
摘要
申请公布号
US2792822(A)
申请公布日期
1957.05.21
申请号
US19540428623
申请日期
1954.05.10
申请人
PONZA LORENZO J
发明人
PONZA LORENZO J.
分类号
A63B69/40
主分类号
A63B69/40
代理机构
代理人
主权项
地址
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