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2020
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Invention
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Chamfering device. A chamfering device. The distance from an outer peripheral face of cutting tee... |
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Invention
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Pagoda drill. A pagoda drill, comprising a handle portion (2) and a drill body portion (3), where... |
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Invention
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Twist drill. A twist drill. A cone portion (11) is provided at the front end of a working portion... |
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Invention
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Transversely-cutting compound drill bit. A transversely-cutting compound drill bit, comprising a ... |
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Invention
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Screw drilling and taking-out integrated tool. A screw drilling and taking-out integrated tool, c... |
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2016
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Invention
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High efficiency step-structured twist drill. A high efficiency step-structured twist drill compri... |
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2015
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Invention
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Highly efficient, anti-vibration, durable rotating file with variable pitch. Disclosed is a highl... |
