Coal bunker mediation is bored with digging brokenly soon to encircle
The utility model discloses a coal bunker mediation is bored with digging brokenly soon to encircle, including drill bit and hydraulic power unit, drill bit connection of after section has the pneumatic cylinder, the pneumatic cylinder bottom is provided with A circular base, base side equipartition...
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Format: | Patent |
Sprache: | chi ; eng |
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