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发明名称
摘要
申请公布号
JPS5445463(U)
申请公布日期
1979.03.29
申请号
JP19770119782U
申请日期
1977.09.05
申请人
发明人
分类号
B04B1/20;(IPC1-7):B04B1/20
主分类号
B04B1/20
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