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发明名称
HEIGHT-ADJUSTABLE SCHOOL BLACKBOARD
摘要
申请公布号
CA718162(A)
申请公布日期
1965.09.21
申请号
CAD718162
申请日期
申请人
PALOR AG NIEDERURNEN
发明人
MAX ALTMANN;HANS JENNY
分类号
主分类号
代理机构
代理人
主权项
地址
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