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发明名称
Improvements in steps
摘要
申请公布号
AU719227(B2)
申请公布日期
2000.05.04
申请号
AU19960045854
申请日期
1996.03.01
申请人
WILLIAM DE BRUYN
发明人
WILLIAM DE BRUYN
分类号
E04F11/09;(IPC1-7):E04F11/09
主分类号
E04F11/09
代理机构
代理人
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地址
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