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发明名称
WATER PERMEABILITY TEST METHOD AND APPARATUS FOR BED
摘要
申请公布号
JPH02304112(A)
申请公布日期
1990.12.17
申请号
JP19890124692
申请日期
1989.05.17
申请人
OYO CORP
发明人
OI YUKIO;TAKAHASHI AKINORI
分类号
E21B49/00;E02D1/00
主分类号
E21B49/00
代理机构
代理人
主权项
地址
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