Switches between sample and reference beam. Four-segment design provides individual blank readings for sample and reference, increasing measurement accuracy.

斩波器，将光依次切换到参比光路和样品光路，四扇区设计可以提供样品测试和参比测试中分别测试暗电流，增加准确性。

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By design, no one segment occupies more than 21% of Praxair's sales.

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There is no market segment better placed to help consumers design their personal brands than Micro entrepreneurs, who already perform that same task for many big businesses.

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Its original--and safe--design mimicked the leaders in the midsize car segment, the Toyota Camry and Honda Accord.

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