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发明名称
SOUND ABSORBING CERAMIC MATERIAL
摘要
申请公布号
CA359057(A)
申请公布日期
1936.07.14
申请号
CAD359057
申请日期
申请人
THE CANADIAN GYPSUM COMPANY LIMITED
发明人
JOSEPH R. PARSONS
分类号
主分类号
代理机构
代理人
主权项
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