Remain its accuracy by rotating 360 degree around its axle center for Square and cylindroid vials.
精度主要是指圆柱和方水准器沿轴心360度翻身。
Remain its accuracy by rotating 360 degree around its axle center for Square and cylindroid vials.
精度主要是指圆柱和方水准器沿轴心360度翻身。
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，
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