一分快3
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◆采用双光束,双波→长红外式探测器保障长期的稳定性和持久性 ◆大屏幕,易于读取数字.温度双【单位℃℉显示, CO2以ppm显示. ◆单位可选, 角度可调 ◆快速的用外部端口和显示进行校准.用空气或瓶装气体进行校准
