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spindle lock button /ˈspaɪnəl ˈnɜːv/ n

中文：主轴锁定按钮

中文 · 主轴锁定按钮Español · botón de bloqueo del ejeFrançais · bouton de blocage de l’arbre
Meaning：Device preventing the spindle from rotating while the grinding wheel is replaced.
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Angle grinder

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