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I use capacitors, resistors, diodes, trasistor to make electric circuits, and each component has the function of each. and the nine-volt batteries I use that function to switch on the tool for me when the power goes out. and I use the transformer stup up which serves as a useful voltage increase to kill mosquitoes. and I use a UV light (ultraviolet) that serves to invite the mosquitoes go into my tool, because research has proven that mosquitoes are very interested in light/ultra violet rays.
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