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发明名称
BLACKBOARD GROUP
摘要
申请公布号
JPH07309097(A)
申请公布日期
1995.11.28
申请号
JP19950091382
申请日期
1995.03.24
申请人
SAKAWA KOKUBAN SEISAKUSHO:GOUSHI
发明人
SAKAWA MASAKI
分类号
B43L1/04;B43L1/10;(IPC1-7):B43L1/10
主分类号
B43L1/04
代理机构
代理人
主权项
地址
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