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一种量具。利用螺纹的转进、转退，在轴向产生位移的原理而制成，更利用细小螺距使螺纹旋转于圆周上放大，再于圆周上加以刻画，达到细分的目的。在使用上具有精确、便捷且安全的优点，是金工现场工作量测精度最高的量具之一。也称为「千分卡」、「测微器」、「微分卡」。
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modern medical equipment
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更新时间：2026/6/29 11:05:38