The opposite side of the moving surface is provided with a single absolute type optical rule and two groups of read heads.
以及在该运动台面的相对侧设有单支的绝对式光学尺及两组读头。
The opposite side of the moving surface is provided with a single absolute type optical rule and two groups of read heads.
以及在该运动台面的相对侧设有单支的绝对式光学尺及两组读头。
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