Picarro G4301 便携式气体浓度分析仪（GasScouterTM）是一款基于专利波长扫描光腔衰荡光谱技术（CRDS）的高精度温室气体分析仪，专为科研移动测量设计。该设备可在ppb级别精确测量CO2和CH4浓度，具备轻量化、低能耗、内置可充电锂电池支持长时间连续运行、内置WiFi ...

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BEIJING -- The Caihong-4 (CH-4) unmanned aerial vehicle (UAV) has become the first large civil UAV in China to receive a special airworthiness certificate from the Civil Aviation Administration of ...