色彩校准图表为摄影机安装在三个地点对航天器。
Color calibration charts for the cameras are mounted at three locations on the spacecraft.
在四色印刷中，这给色彩对准带来大麻烦，因为每次只能用一种颜色的墨，需要精确校准以避免套色不准及图示不清。
That played havoc with the color register for four-color printing, since the ink, applied one color at a time, required pinpoint calibration to avoid badly aligned, muddy illustrations.
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