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发明名称
BLACKBOARD
摘要
申请公布号
JPS52154431(A)
申请公布日期
1977.12.22
申请号
JP19760070075
申请日期
1976.06.15
申请人
MATSUSHITA ELECTRIC WORKS LTD
发明人
YAMAMOTO KAZUMI
分类号
B43L1/10;B43L1/06
主分类号
B43L1/10
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代理人
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