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on 10 Apr 2000
NORTON CHRISTENSEN GMBH
73154565 · 09 Jan 1978
007
DOWNHOLE MOTORS AND PARTS THEREOF FOR DRILLING BORE HOLES IN EARTH FOR...
on 06 Sep 1999
NORTON CHRISTENSEN GMBH
73101470 · 29 Sep 1976
007
MECHANICAL TOOLS AND PARTS THEREOF FOR FREEING STUCK WELL DRILL STRING...
on 06 Sep 1999
NORTON CHRISTENSEN GMBH
73101468 · 29 Sep 1976
007
STABILIZERS FOR WELL DRILL STRINGS; AND PARTS THEREOF,STABILIZERS FOR ...
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