- 专利标题: Combined marine knotmeter, log and depth sounder
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申请号: US343007申请日: 1982-01-26
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公开(公告)号: USD273571S公开(公告)日: 1984-04-24
- 设计人: Ronald R. Overs
- 申请人: Ronald R. Overs
公开/授权文献
- US5621706A Method and apparatus for magnetic super-resolution recording 公开/授权日:1997-04-15
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