痕量气体监测仪
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Trace Ammonia Gas Monitor 氨气追踪监测仪
trace-gas monitor
示踪气体监测
以上为机器翻译结果，长、整句建议使用 人工翻译 。
A glass tube containing catalyst 401 which is used as a color indicator for trace amount of oxygen was connected with the sample tube to monitor the purity of carrier gas during operation.
为了检测载气的纯度，在样品管进口直接连接装有变色的401型脱氧催化剂的检测管。
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