| 摘要 |
A micrometer wherein a rotary knob and a pinion are threadably coupled to each other, further, a resilient member for functioning as a constant pressure is interposed between the rotary knob and the pinion, and, when the rotary knob is rotated by a value of distortion of the resilient member after a spindle having a rack meshed with the pinion is abutted against a workpiece to be measured and stopped, the rotary knob is moved in a direction of the rotary shaft thereof, whereby a portion of the rotary knob is abutted against a main frame, thereby acting as a locking function.
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