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Why does the drilling speed slow down? Why can't it drill down?
2026-03-06
First, please check whether the brass screws on the main unit are tightened. If the copper screws are loose, the main unit and the track will not be parallel and affect the drilling efficiency. If the inspection is correct, please check whether the drill pipe is stuck in the steel bar or iron piece. Please refer to the video: https://youtu.be/KdvLSXsfCqM
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