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It was on February 27th, 1892 that Diesel filed a patent within the patent office in Germany for his method and design for that combustion engine. He sourced contracts from firms that manufactured machines and began his experimentation stage. During this stage he constructed working types of his design in an attempt to construct the most efficient engine of that time. Food preservation involves treating and handling food with the idea to greatly slow or stop spoilage that caused or accelerated by micro-organisms. Preservation normally involves preventing the development of fungi, bacteria along with other micro-organisms, along with the oxidation of fats which the cause rancidity. However, many ways of preservation actually use benign fungi, yeasts or bacteria to preserve food and add specific qualities, by way of example wines or cheeses. It may also include processes which inhibit aging and discoloration that occur during cooking, much like the enzymatic browning (oxidation) in apples when they are cut. Some food has to be sealed after treatment to avoid recontamination with microbes while others, including drying, mean food can be stored without special containment. There are many methods of preserving food including freezing, freeze drying, spray drying, food irradiation, sugar crystallization, adding preservatives, preserving in syrup, canning an d vacuum-packing. Much like real soldiers, the smart sniper keeps his equipment in tiptop shape as a way to gain an advantage about the enemy. A soiled and dirty rifle will affect its accuracy and efficiency. Regular cleaning with the Airsoft sniper rifle is essential, along with any other weapons he carries. Buy a proven Airsoft gun cleaner like a silicone spray and use it every 2000 to 5000 shots.