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To drive in a nail with a hammer, first pull out a piston with all owns strength and then switch on, screwed it up. Put silicon in at the front of hammer, and then put the other side of it in at entrance. Put a hammer slightly to the position where nail was drove by modulating transparent tube, then switch off, the piston was expelled because of strength force at the same time unlocked it. Such principle is to use air pressure of injector, so the nail is driven against wall pushing nailed at front side silicon at the same time piston pushing compressed air strongly.
Gyeongsan-si, Gyeongbuk, South Korea
Nam-gu, Daegu, South Korea
jin ho / KWON