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发明名称
摘要
申请公布号
JPH0428246(U)
申请公布日期
1992.03.06
申请号
JP19900070834U
申请日期
1990.07.03
申请人
发明人
分类号
E01D1/00;E04H9/02;F16F15/02;(IPC1-7):F16F15/02
主分类号
E01D1/00
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