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发明名称
ARTIFICIAL AND NATURAL STRUCTURES IMPREGNATED BY USING A FLEXIBLE, FLUID IMPERMEABLE COVERING
摘要
申请公布号
US4169909(A)
申请公布日期
1979.10.02
申请号
US19770845036
申请日期
1977.10.25
申请人
BALFOUR BEATTY LTD
发明人
MILNE, JAMES
分类号
E02D37/00;E04G23/02;(IPC1-7):E02D37/00
主分类号
E02D37/00
代理机构
代理人
主权项
地址
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