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发明名称
BLACKBOARD USING WATER CRAYON
摘要
申请公布号
JPS5670996(A)
申请公布日期
1981.06.13
申请号
JP19790146383
申请日期
1979.11.14
申请人
TAIYO KOGYO CO LTD;MITSUBISHI KEIKINZOKU KOGYO
发明人
TSUKAMOTO TADASHI
分类号
B43L1/10
主分类号
B43L1/10
代理机构
代理人
主权项
地址
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