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发明名称
A prop pre-stressing device and its manufacture.
摘要
申请公布号
ZA200109389(B)
申请公布日期
2002.06.18
申请号
ZA20010009389
申请日期
2001.11.14
申请人
MAN-DIRK (PROPRIETARY) LIMITED
发明人
ALLEN PRESTON LAWRENCE
分类号
E21D
主分类号
E21D
代理机构
代理人
主权项
地址
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