- 专利标题: Improvement in composition of emery for grinding and polishing tools
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申请号: US25841D申请日:
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公开(公告)号: US25841A公开(公告)日: 1859-10-18
公开/授权文献
- USRE25841E Clothes hanger 公开/授权日:1965-08-17
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