The formation mechanism of orange valvule-like pinhole in rolled aluminium foil was investigated by using optical microscopy,scanning electron microscopy,and energy dispersion X-ray spectrum.
利用光学、扫
、能谱分析等试验手段对铝箔中"桔瓣"形针孔形成的
因进行了分析。
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In Florida, legislators rewrote state laws, switched to paper ballots and optical scanners (no more butterfly ballots or hanging chads), and mandated automatic recounts for races with margins of half a percentage point.
佛罗里达州议员重修了州法律,投票改用纸质选票和光学扫
(从此再也不会出现所谓
“蝴蝶选票”或者“孔屑废票”了)还对用误差范围为0.5%
机器重新统计选票做出了硬性要求。