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.
利显微镜、扫描电镜、
析等试验手段对铝箔中"桔瓣"形针孔形成的
因进行了
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.
佛罗里达州的议员重修了州法律,投改用纸
和光学扫描仪(从此再也不会出现所谓的“蝴蝶
”或者“孔屑废
”了)还对用误差范围为0.5%的机器重新统计
做出了硬性要求。