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发明名称
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摘要
申请公布号
US2838153(A)
申请公布日期
1958.06.10
申请号
US19540434286
申请日期
1954.06.03
申请人
ARMSTRONG CORK COMPANY
发明人
SPENCER VIRGIL
分类号
B65G47/72
主分类号
B65G47/72
代理机构
代理人
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