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2013-05-23 12:21
求翻译：Surface strains were measured with a non-contact laser speckle technique. A small surface area at the half-length of the specimen was roughened by 1000 mesh abrasive paper. When the laser beam is aimed at this area an interference pattern is created in the reflected beam detected by four CCD narrays of sensors, see Fig是什么意思？ 待解决
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Surface strains were measured with a non-contact laser speckle technique. A small surface area at the half-length of the specimen was roughened by 1000 mesh abrasive paper. When the laser beam is aimed at this area an interference pattern is created in the reflected beam detected by four CCD narrays of sensors, see Fig
问题补充： |
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