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发明名称
GRAVITY DRIVE
摘要
申请公布号
CA487378(A)
申请公布日期
1952.10.21
申请号
CAD487378
申请日期
申请人
GEORGE WIXSON
发明人
GEORGE WIXSON
分类号
主分类号
代理机构
代理人
主权项
地址
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