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With the rapid development of science and technology, electronic products integration more and more high, to ensure that the product function is normal, stable performance, product cleaning is very important. Usually use CFC in electronics industry in the past, because can cause the destruction of the ozone layer and the greenhouse effect, has been disabled. Because the alternatives as chlorine, still only as transitional alternative cleaning solvents. 3 m company launched HFE - 7100 production can fully meet the requirements of production process, as well as on environmental protection and security are excellent. In crystals, sealing leak detection test is done with 3 m liquid fluoride (FC - 40) (FC - 770) but it is more than 3 m several products are factory production abroad, from raw materials, producing area, the prices of these goods are high, let domestic enterprises very upset, I ? company needle