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发明名称
摘要
申请公布号
JPH0692642(B2)
申请公布日期
1994.11.16
申请号
JP19900114220
申请日期
1990.04.27
申请人
发明人
分类号
E01C7/30;E01C7/32;(IPC1-7):E01C7/30
主分类号
E01C7/30
代理机构
代理人
主权项
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