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The rapid development of air filters is closely related to the development of military industry and electronic industry. In the first world war, the use of various chemical agents, asbestos fibre filter paper as the smoke filter layer of military gas masks came into being. The glass fiber filter medium is used in air filtration to obtain a patent in the United States in October 1940. In the 1950s, the United States studied the production process of glass fiber filter paper, and the air filter was improved and developed. In the 1960s, HEPA filters came out; In the 1970s, the filter paper of fine glass fiber was used as the HEPA filter of filter medium, and the filtration efficiency of particle size of 013 micron particle diameter was 99.9998%. Since the eighty s, with the emergence of new test method, use evaluation to improve and to improve the filtering performance requirements, found the HEPA filter there is a serious problem, and he had a higher ULPA filter performance. Countries are still working on it and expect more advanced air filters soon In the workplace, the law of competition is that the strong have the rules of the game and the weak have the law of survival. As a team member, it must be remembered that only a fully functioning team is one of the most competitive teams. And only in one of the most competitive teams, the value of the individual can be maximizes! When you are on the team that piece of "short board", should help to accept "long wooden board", make every effort to improve their abilities, don't let yourself dragging the hind legs of the team, when you are on the team that piece of "long boards," you can not only advance footsteps, and ignore the existence of "short board", so, you harvest will be the same achievement as "short board". When we are in a team, only to find ways to make a short board to reach the height of the long wooden board, or keep all the board "enough" of equal height, can fully give play to the role of the team. The automatic filter consists of shell, multiple filter element, anti-flush mechanism, electric control box, reducer, electric valve and differential pressure controller. Casing of diaphragm plate inside cavity can be divided into upper and lower two cavity, the cavity is equipped with multiple filter core, so that make full use of the filter space, significantly reduce the filter size, are installed in the inferior vena backwash suction cups.

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