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发明名称
LEVEL CHANGING SYSTEM
摘要
申请公布号
GB9225216(D0)
申请公布日期
1993.01.20
申请号
GB19920025216
申请日期
1992.12.02
申请人
ROSE, JONATHAN D B
发明人
分类号
主分类号
代理机构
代理人
主权项
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