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发明名称
SELF-CLEANING ENDLESS TRACKS
摘要
申请公布号
CA520455(A)
申请公布日期
1956.01.10
申请号
CAD520455
申请日期
申请人
GEORGE W. CURTIS
发明人
GEORGE W. CURTIS
分类号
主分类号
代理机构
代理人
主权项
地址
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