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【简答题】
关于螺丝刀的使用方法正确的有 A. 根据螺丝钉头 部的槽宽、槽 形、规格选用 适当的螺丝刀 。 B. 如发现批头有 崩牙、磨损、 变钝等缺陷时 不再使用 C. 将螺丝刀自然 拿直,使紧 贴螺丝头缺口 。 D. 使螺丝刀中心 轴保持垂直于 螺丝面不歪斜 、晃动，使用 合适的力矩旋 紧或松开
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