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发明名称
BLACKBOARD
摘要
申请公布号
JPS52116325(A)
申请公布日期
1977.09.29
申请号
JP19760032960
申请日期
1976.03.25
申请人
OGURA SHIGEO
发明人
OGURA SHIGEO
分类号
B43L1/08
主分类号
B43L1/08
代理机构
代理人
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地址
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