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SHAFT DRILLING
申请公布号:
AU4059178(A)
申请号:
AU19780040591
申请日期:
1977.10.14
申请公布日期:
1980.04.17
申请人:
FRANKIPILE AUSTRALIA PTY. LTD.
发明人:
TERENCE GEORGE JASPER
分类号:
E21B3/04;E21B15/04;E21D1/03
主分类号:
E21B3/04
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