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发明名称
Variable gear drive
摘要
申请公布号
US2898775(A)
申请公布日期
1959.08.11
申请号
US19550486839
申请日期
1955.02.08
申请人
E.R.D. LABORATORIES, INC.
发明人
REID HENRY
分类号
B21C23/21;F16H27/08
主分类号
B21C23/21
代理机构
代理人
主权项
地址
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