Drill jumbo propelling device capable of drilling in bent mode and drilling method
The invention relates to a drill jumbo propelling device capable of drilling in a bent mode and a drilling method. The drill jumbo propelling device comprises a rock drill, a drill rod, a middle drill rod lifter, a propelling beam, an end base, a fixed supporting mechanism, an end supporting mechani...
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Format: | Patent |
Sprache: | chi ; eng |
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