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发明名称
Hydraulic clock
摘要
申请公布号
US2749700(A)
申请公布日期
1956.06.12
申请号
US19530390221
申请日期
1953.11.04
申请人
HANS SELIGMAN
发明人
SELIGMAN HANS
分类号
G04B1/00
主分类号
G04B1/00
代理机构
代理人
主权项
地址
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