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发明名称
Automatic control for artificial light for poultry houses
摘要
申请公布号
US1964846(A)
申请公布日期
1934.07.03
申请号
US19310550587
申请日期
1931.07.13
申请人
EARNSHAW ALVIN R
发明人
EARNSHAW ALVIN R.
分类号
G04C23/14
主分类号
G04C23/14
代理机构
代理人
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地址
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