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METHOD OF FORMING HUMAN HOLE VIA PRECAST CONCRETE TUBE

申请公布号:JPS54460(A)

申请号:JP19770064856

申请日期:1977.06.03

申请公布日期:1979.01.05

申请人:
NIPPON HIYUUMU KAN KK

发明人:IMAIZUMI KIYOSHI

分类号:E02D29/12

主分类号:E02D29/12

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