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PaedDr. Jozef Beňuška j benuska @nextra.sk

VÝZNAM TŘECÍ SÍLY aneb O ložiskách, mazivu a kolech automobilů. PaedDr. Jozef Beňuška j benuska @nextra.sk. Proč se na kola automobilů používají při jízdě po sněhu řetězy?. Proč se povrch čelistí plochých kleští vroubkuje?. Na hlavičce hřebíku bývají vrypy tvaru mřížky a pod

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PaedDr. Jozef Beňuška j benuska @nextra.sk

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