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发明名称
SHEET METAL EXPANDING METHOD
摘要
申请公布号
CA383607(A)
申请公布日期
1939.08.22
申请号
CAD383607
申请日期
申请人
CANADIAN GYPSUM COMPANY LIMITED;UNITED STATES GYPSUM COMPANY
发明人
MICHAEL G. VASS
分类号
主分类号
代理机构
代理人
主权项
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