Pre-stressing device for a support prop.,申请号ZA20030000526-传众专利搜索

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发明名称	Pre-stressing device for a support prop.
摘要
申请公布号	ZA200300526(B)	申请公布日期	2003.08.11
申请号	ZA20030000526	申请日期	2003.01.17
申请人	NTONJANENI SAW MILL (PTY) LTD.	发明人	RAYMOND BARKLEY BOTHA
分类号	E21B;E21D	主分类号	E21B
代理机构		代理人
主权项
地址

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