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经营范围
发明名称
Low-water-pressure controlled hydrologic test method
摘要
申请公布号
US4986120(A)
申请公布日期
1991.01.22
申请号
US19890361883
申请日期
1989.06.06
申请人
DORYOKURO KAKUNENRYO KAIHATSU JIGYODAN;TAISEI KISO SEKKEI CO., LTD.
发明人
YANAGISAWA, KOICHI;HIRATA, YOICHI
分类号
E02D1/02;E21B49/00
主分类号
E02D1/02
代理机构
代理人
主权项
地址
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