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发明名称
摘要
申请公布号
JPS6216589(U)
申请公布日期
1987.01.31
申请号
JP19850108992U
申请日期
1985.07.16
申请人
发明人
分类号
E01B25/28;B63B21/64;E01B26/00;E02B3/20;(IPC1-7):B63B21/64
主分类号
E01B25/28
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