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keyless chuck /ˈkiːləs ˈtʃʌk/ n

中文：免钥匙夹头

中文 · 免钥匙夹头Español · mandril de sujeciónFrançais · mandrin autoserrant
Meaning：Chuck with a regulating ring that automatically tightens the jaws on the tool’s shank.
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Cordless drill driver

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