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发明名称
摘要
申请公布号
JPH0490631(U)
申请公布日期
1992.08.07
申请号
JP19900406640U
申请日期
1990.12.21
申请人
发明人
分类号
B66F7/14;E04F19/08;(IPC1-7):E04F19/08
主分类号
B66F7/14
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