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发明名称
摘要
申请公布号
JPS52118560(U)
申请公布日期
1977.09.08
申请号
JP19760026569U
申请日期
1976.03.05
申请人
发明人
分类号
E03D11/16;E03D11/17;G01C9/36;(IPC1-7):E03D11/17
主分类号
E03D11/16
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