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深国安专业介绍PPM与气体体积浓度、质量与体积浓度的换算

对大气中的污染物，常见体积浓度和质量-体积浓度来表示其在大气中的含量。体积浓度是用每立方米的大气中含有污染物的体积数（立方厘米）或（ml/m3）来表示

2018-05-14

沼气发酵设备用高浓度红外线甲烷和二氧化碳气体检测仪

沼气发酵又称为厌氧消化、厌氧发酵，是指有机物质（如人畜家禽粪便、秸秆、杂草等）在一定的水分、温度和厌氧条件下，通过各类微生物的分解代谢，最终形成甲烷和二氧化碳等可燃性混合气体（沼气）的过程。又称有机垃圾的厌氧发酵技术。

2018-02-01

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基本文件流程错误 SQL 调试

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