What are key manufacturers for small furniture casters ?
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Features of nano-materials What is nano material?Nano (nm) is the same as meters, microns and other units,Is a unit of length,One nano is equal to ten minus nine power meters,About an order of magnitude older than chemical bonds.Nanotechnology is studied by size at 0.The laws of movement and interaction of the system of matter composition between 1 and 100 nanometers and the science and technology of possible practical application of technical problems.It can be derived from cashier's rice electronics, mechanics, biology, material science and processing, etc.Nano-materials refer to the fact that at least one dimension of the three dimensional spatial scale is in the order of nano-scale (1-Material of 100nm,It is a new generation of materials consisting of nanoparticles with dimensions between atoms, molecules and macro systems.Due to the small scale of its constituent units,The interface takes up a considerable amount of ingredients.Therefore,Nano-materials have a variety of features,This leads to the eme
Is the water of household water purifier mineral? It mainly depends on the types of water purifiers. common household water purifiers include pre-filter, water purifier, water softener and direct drinking machine. generally, direct drinking machines filter out large molecules such as minerals.According to the different pore sizes of the filter membrane, the direct drinking machine is divided into three types: Micro-pore filtration, ultra-filtration and reverse osmosis. reverse osmosis is used to separate small molecule solutes, which can not only filter bacteria and viruses, but also filter out heavy metal plasma, minerals can be filtered out.With regard to whether pure water is harmful to the body, the reply of the health department's law supervision department on issues related to pure water (health law supervision and food delivery [2009] No. 119) clearly stated in the text, pure water that meets the relevant regulations and hygiene standards is 'safe, hygienic and harmless '.As long as the