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发明名称
Spear head assembly
摘要
申请公布号
AUPN651895(D0)
申请公布日期
1995.12.07
申请号
AU1995PN06518
申请日期
1995.11.10
申请人
DOWN HOLE TECHNOLOGIES PTY LTD
发明人
分类号
E21B21/00;E21B23/00;E21B23/01;E21B23/14
主分类号
E21B21/00
代理机构
代理人
主权项
地址
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