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发明名称
METHOD OF AND APPARATUS FOR FORMING RING SHAPED PLASTIC SHEET
摘要
申请公布号
CA538877(A)
申请公布日期
1957.04.02
申请号
CAD538877
申请日期
申请人
GEORGE A. LYON
发明人
GEORGE A. LYON
分类号
主分类号
代理机构
代理人
主权项
地址
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