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      With rotating drill into the rock excitation device

      With rotating drill into the rock excitation device

      With auxiliary rotating drill top institutions triangle structure change

      With auxiliary rotating drill top institutions triangle structure change

      A rotating drill head

      A rotating drill head

      Walking hydraulic mechanical engine speed and the main pump with displacement

      Walking hydraulic mechanical engine speed and the main pump with displacement

      For mine hydraulic monorail crane truck driver of automatic release

      For mine hydraulic monorail crane truck driver of automatic release

      A mine monorail crane truck brake buffer device

      A mine monorail crane truck brake buffer device

      A new type of variable rotating drill triangle

      A new type of variable rotating drill triangle

      Rotating drill motor speed control device

      Rotating drill motor speed control device

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