àåìé çåôù øãéàìé áöéø ùì äôòîåï.
àðé ìà çåùá ùéù ìê àôùøåú øéàìéú ìôúåø áòéä ëæàú åæä âí ìà îùîòåúé.
https://www.researchgate.net/profile...easurement.ppm

ìâáé äãì÷ ðøàä ùäáòéä áçì÷ 6
https://www.bike-parts-sym.com/sym-m...K/470/62/0/928