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发明名称
System and mechanism for making ordinary pianos respond to player piano rolls
摘要
申请公布号
US2924139(A)
申请公布日期
1960.02.09
申请号
US19570692153
申请日期
1957.10.24
申请人
ROBERT GREEN ARTHUR
发明人
GREEN ARTHUR ROBERT
分类号
G05B19/14
主分类号
G05B19/14
代理机构
代理人
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地址
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