medical oxygen flow meter

Flow Meters – Silver Automation Instruments

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1. Its quite urgent. I have an English translation. Can you help me take a look at my poor English foundation ..

This type of equipment for water meter calibration was manufactured by a water supply company (water meter instrument manufacturing plant) in Beijing, which was the only one in China at that time. This device was manufactured in the 1980s and used until 2010 for calibrating water meters using the static volume method. This device is calibrated using the static volume method for water hoses or meters. The device is used to calibrate water meters, and the values caused by faults are measured using the static volume method. This device was produced according to national standards and the national import and export commodity inspection procedures for water meters. It was used by the Beijing Water Supply Company (now known as Jingzhao Water Meter Co., Ltd.) in the mid-1980s until 2010. Ozone generators in China were the first to use advanced ozone activated carbon adsorption process treatment technology in high-altitude water purification plants from 1985 to 2007. The ozone generator is imported from Japan. Ozone. After the technical equipment/device is installed, dry and humidified, fresh air is then applied by two opposing electrodes with high voltage, and oxygen is produced according to the ozone concentration. Ozone can clean, sterilize, oxidize organicmesh, shed car DOC, and more. Roller - winch - water press - hydraulic press - water meter calibration device - water meter calibration equipment

2. BOD and COD indicators in water environment monitoring

Chemical oxygen demand COD and biological oxygen demand BOD are the most important indicators in water environment monitoring, mainly ch

aracterizing the amount of reducing pollutants in water Due to the wide variety of organic compounds, it is impossible to measure their respective contents, so BOD and COD are commonly used as comprehensive indicators. The decomposition of organic matter in water is carried out in two stages. The first stage is the carbon oxidation stage, and the second stage is the nitrification stage. The amount of oxidation consumed in the carbon oxidation stage becomes the Carbonization Biochemical Oxygen Demand (CBOD). Hydrocarbons, proteins, oils, lignin, and other organic pollutants that exist in suspended or dissolved states in domestic sewage and industrial wastewater such as sugar, food, paper, and fiber production are all organic pollutants that can be decomposed through the biochemical action of aerobic bacteria. Due to the consumption of oxygen during the decomposition process, they are also known as aerobic pollutants. If too many pollutants such as reed are discharged into the water, it will cause a lack of dissolved oxygen in the water. At the same time, organic matter will also cause decay through the decomposition of anaerobic bacteria in the water, producing odorous gases such as methane, hydrogen sulfide, thiols, and ammonia, causing the water to deteriorate and become foul smelling. Organic matter is basically a reducing substance that can be oxidized by chemical oxidants. The more organic matter there is, the more oxidants are consumed, so the amount of oxidants consumed (converted to mg/L of O2) can indirectly reflect the content of organic matter. But not all organic compounds can be oxidized, such as lower fatty acids mainly composed of acetic acid, which can hardly be oxidized. In addition, oxidized pollutants a

1. Its quite urgent. I have an English translation. Can you help me take a look at my poor English foundation ..

2. BOD and COD indicators in water environment monitoring

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