silikonový olej wd40 http://www.google.cz/search?hl=cs&site=imghp&tbm=i sch&source=hp&biw=1012&bih=647&q=wd40&oq=wd40&gs_l =img.3..0j0i24l4j0i10i24j0i24l4.43.2294.0.2899.6.5 .1.0.0.0.113.499.3j2.5.0...0.0...1ac.1.3.img.1WlvJ NOgHh0
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