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"PIOTROWSKI; HANS-DIETER"
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"PIOTROWSKI; HANS-DIETER"
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Hydraulic operated impact drilling device
by
PIOTROWSKI
,
HANS
-
DIETER
Year of Publication
13.09.2000
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Releasable joint for connecting a drill string section with a drive shaft in hydraulic rotary percussive drilling equipment used for earth and rock drilling of boreholes
by
PIOTROWSKI
,
HANS
-
DIETER
Year of Publication
09.09.1999
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SCHLAGWERK FÜR EIN BOHRGESTÄNGE
by
BARTELS, ROBERT-JAN
,
PIOTROWSKI
,
HANS
-
DIETER
Year of Publication
15.02.1997
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Percussion mechanism for drill string
by
BARTELS, ROBERT-JAN
,
PIOTROWSKI
,
HANS
-
DIETER
Year of Publication
15.01.1997
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HYDRAULISCH BETRIEBENE SCHLAGDREHBOHRVORRICHTUNG, INSBESONDERE ZUM ANKERLOCHBOHREN
by
BARTELS, ROBERT-JAN
,
PIOTROWSKI
,
HANS
-
DIETER
Year of Publication
15.12.1995
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Hydraulically operated impact drilling device, especially for boltdrilling
by
BARTELS, ROBERT-JAN
,
PIOTROWSKI
,
HANS
-
DIETER
Year of Publication
13.12.1995
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HYDRAULISCH BETRIEBENES SCHLAGWERK
by
BARTELS, ROBERT-JAN
,
PIOTROWSKI
,
HANS
-
DIETER
Year of Publication
15.10.1995
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Hydraulically operated percussion mechanism
by
BARTELS, ROBERT-JAN
,
PIOTROWSKI
,
HANS
-
DIETER
Year of Publication
11.10.1995
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HYDRAULISCH BETRIEBENE SCHLAGDREHBOHRVORRICHTUNG, INSBESONDERE ZUM ANKERLOCHBOHREN
by
BARTELS, ROBERT-JAN
,
PIOTROWSKI
,
HANS
-
DIETER
Year of Publication
15.11.1994
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Hydraulic operated impact drilling device, especially for bolt drilling
by
BARTELS, ROBERT-JAN
,
PIOTROWSKI
,
HANS
-
DIETER
Year of Publication
19.10.1994
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Hydraulic operated impact drilling device
by
PIOTROWSKI
,
HANS
-
DIETER
Year of Publication
20.10.1999
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Percussion mechanism for a drill rod unit
by
PIOTROWSKI
;
HANS
-
DIETER
,
BARTELS; ROBERT-JAN
Year of Publication
09.11.1993
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PERCUSSION MECHANISM FOR DRILL STRING
by
BARTELS, ROBERT-JAN
,
PIOTROWSKI
,
HANS
-
DIETER
Year of Publication
14.07.1993
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HYDRAULICALLY OPERATED STRIKING MECHANISM
by
PIOTROWSKI
;
HANS
-
DIETER
,
BARTELS; ROBERT-JAN
Year of Publication
14.07.1992
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HYDRAULICALLY OPERATED HAMMER DRILL
by
PIOTROWSKI
;
HANS
-
DIETER
,
BARTELS; ROBERT-JAN
Year of Publication
02.06.1992
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HYDRAULIC OPERATED IMPACT DRILLING DEVICE, ESPECIALLY FOR BOLT DRILLING
by
BARTELS, ROBERT-JAN
,
PIOTROWSKI
,
HANS
-
DIETER
Year of Publication
27.05.1992
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HYDRAULICALLY OPERATED PERCUSSION MECHANISM
by
BARTELS, ROBERT-JAN
,
PIOTROWSKI
,
HANS
-
DIETER
Year of Publication
20.05.1992
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HYDRAULICALLY OPERATED IMPACT DRILLING DEVICE, ESPECIALLY FOR BOLTDRILLING
by
BARTELS, ROBERT-JAN
,
PIOTROWSKI
,
HANS
-
DIETER
Year of Publication
08.04.1992
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VORRICHTUNG ZUM SCHLAGENDEN BOHREN VON LANGEN LOECHERN
by
ARNDT, FRIEDRICH-KARL
,
PIOTROWSKI
,
HANS
-
DIETER
Year of Publication
15.12.1989
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APPARATUS FOR PERCUSSION DRILLING LONG HOLES
by
ARNDT, FRIEDRICH-KARL
,
PIOTROWSKI
,
HANS
-
DIETER
Year of Publication
23.11.1989
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