内部的屏蔽层应该在扫描仪的一面切开，并且连接上火焰控制器的地线上。
The inner screening shall be cut on the scanner side and connected to ground at the flame controller.
采用富氧屏蔽火焰原子吸收光谱法成功地测定天青石中钡含量。
The content of barium in lapis lazuli was successfully determined by oxygen-enriched shield flame atomic absorption spectrometry.
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