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经营范围
发明名称
AUTOMATIC FEED CONTROL SYSTEM
摘要
申请公布号
US3734202(A)
申请公布日期
1973.05.22
申请号
USD3734202
申请日期
1971.03.12
申请人
GYONGYOSI L,US
发明人
GYONGYOSI L,US
分类号
E21B44/06;(IPC1-7):E21C5/11
主分类号
E21B44/06
代理机构
代理人
主权项
地址
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