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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
To bake the salmon, position the fillets in a very dish that is sprayed with extra virgin olive oil apply or wrap the salmon in foil with various spices i.e. research different seasonings or even a squeeze of lemon juice or a hint of soy sauce. Bake the fish in the pre-heated oven for around 15-20 min's or until cooked the way you like (note - cooking times can vary depending on the sized your fillets). Serve the unseasoned salmon with mayo or djonaisse as well as a lemon wedge. For seasoned fillets, there's no need for everyone with additional condiments. Serve the salmon which has a mixed green salad to get a healthy and in addition balanced meal.
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