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GB 13580.5-92 Determination of fluorine, chlorine, nitrite, nitrate and sulfate in atmospheric precipitation
，回答以下几个问题：
Introduction
Atmospheric precipitation is a water cycle process and usually blended with aerosol particles, dust and other substances. These substances include halogens (such as fluoride and chlorine), nitrite, nitrate, sulfate, etc. The Chinese national standard GB 13580.5-92......
1028 
Aiden
GWPB 4-1999 Discharge Standard of Water Pollutants for Synthetic Ammonia Industry
GWPB 4-1999 Synthetic Ammonia Industry Water Pollutant Discharge Standard
The General Water Pollution Prevention and Control Board (GWPB) 4-1999 Synthetic Ammonia Industry Water Pollutant Discharge Standards is intended to address pollutants discharged from the synthetic ammonia industry, includi......
Ultrasonic testing
Ultrasound Imaging Ultrasound imaging, also known as one of medical sonography, is a diagnostic imaging technique based on the application of high frequency sound waves to visualize the inner parts of the body. Ultrasound imaging can be used for a variety of medical conditions, including pregnancy,......
Top: internal dial top
What is the Elixir of Life?
The Elixir of Life, also known as the Philosopher’s Stone or the elixir vitae, is an alchemical substance reputedly able to prolong life and even grant immortality. It is most often associated with the legendary ‘Fountain of Youth’, which promises to restore the dri......
lost wax method
Introduction
Lost wax casting is a traditional casting technique used for making sculptures and complex components for industrial use. As the name implies, it involves the use of a wax model which is “lost” in the casting process. First, the model is made in a wax material and is carefully shap......
Harmful ingredients in cast iron smelting
Introduction
Iron smelting is the process of heating and melting iron ore over high temperatures in a blast furnace. The aim of this process is to separate impurities from the iron resulting in wrought iron or pig iron which can then be used to create a vast number of finished iron products. In th......
Structural features of unloading device on cooling bed
Cooling Bed Unloading Device
With the development of social life level, cooling bed has become an indispensable device of our daily life.The cooling bed unloading device is mainly used to help people unload their cooling bed from the truck in a safe and efficient way.The cooling bed unloading dev......
split ring
The use of the Detached Ring Method has been a common practice for those who want to reduce the risk of death from sudden cardiac arrest. The Detached Ring Method consists of two rings, one worn around the lower leg and one around the upper arm.
These rings are made of a soft material and are att......
Oxygen Lance
Oxygen Guns
Oxygen guns are a type of tool which is used for medical purposes. They can deliver a concentrated stream of oxygen directly to the affected area of a patient’s body. This makes them ideal for administering emergency treatments and providing relief to people suffering from respirator......
muscovite
Groom and Bride
Out of all the days that I have waited,
The day I married the love of my life was the most delightful.
The Groom and Bride exchanged vows on a beautiful white cloud marble church, set against the backdrop of a clear sunset and the undulating hills of their homeland.
The bride wore......
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