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3Â¥2012-05-09 12:27:50
wj060212
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4Â¥2012-05-09 14:48:16
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In three dimensional optical profilometry, roughness is usually expressed as surface area roughness (Sa). Profile roughness (Ra) can be extracted as a line through an area. Interestingly, Sa is also able to report average Ra through a surface by averaging several profiles. 看�应该就是平�粗超度 |

5Â¥2012-05-09 15:31:32
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