... spine micrometers齿槽（花键）千分尺 point micrometers尖头千分尺 Crimp Height Micrometers夹钳式高度千分尺 ...
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Three point internal micrometers 三爪内径千分尺
Internal micrometers with two-point contact 两点内径千分尺
Many minerals in the asbestos family can absorb light with a wavelength measuring two-point three micrometers.
VOA: special.2009.11.17
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