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发明名称
摘要
申请公布号
JPS5648637(Y2)
申请公布日期
1981.11.13
申请号
JP19770126768U
申请日期
1977.09.20
申请人
发明人
分类号
B63B21/50;(IPC1-7):B63B21/50
主分类号
B63B21/50
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代理人
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