infra-red vehicle detector 红外线车辆检测器 infra-red radiation detector 红外光束火灾探测器 infra-red vehellocle detector 红外线车辆检测器 ..
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infra red radiation detector 红外线辐射探测器
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By tuning the quantum cascade laser and measuring how much of the infra-red radiation is absorbed on its way to a detector, hazardous gases in between can be identified.
ECONOMIST: Lasers
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