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发明名称
Method and apparatus for forming multi-layer, paper test sheets
摘要
申请公布号
US3306811(A)
申请公布日期
1967.02.28
申请号
US19640358031
申请日期
1964.04.07
申请人
SYLVESTER GORDON F
发明人
SYLVESTER GORDON F.
分类号
D21G9/00
主分类号
D21G9/00
代理机构
代理人
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