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anchor machine for underground mining

underground mining tunnel high strength rock anchor bolt . drilling with drilling machine, anchor drill or coal electric drill, short bolt length depth ratio 80-100mm. 2. with the pressure tube into the fundus, through compressed air, the hole in the rock powder blowing. 3. the diameter of drilling hole is larger than the diameter of bolt

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These two kinds of have 7 series and 72 models in total.


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