RELSHO

RELSHO (lotini — kaltaki rost), bolorhoi tasmashaklero guyand, ki ba bolosokhti roh khobonda meshavand va baroi harakati poezdhoi rohi ohanu metro, tramvay, arobachahoi daruni kon va zavodho, kranhoi borbardor va gayra peshbini shudaand; bo rohi prokatonidani pulod hosil karda meshavand. Avvalin Relshoi metalli soli 1767 dar Angliya, Relshoi chuyani soli 1788 dar Rossiya tayyor karda shudaand. Az nimai duyumi asri 19 istehsoli Relshoi pulodi ogoz gardid. Dar istehsoloti prokati zamonavi Relshoro az pulodi makhsus tayyor mekunand, ki tarkibi khimiyavii on bo standarti davlati muayyan gardidaast. Az ibtidoi solhoi 70 istifodai Relshoi daroziashon 25 metr vus-at yoft. Darozii Relshoi tramvay 15— 18 metr buda, hangomi khobondan onho ba ham kafsher karda meshavand. Baroi naqliyoti kon, kranhoi borbardor va mekhanizmhoi onho, agregathoi tobkhurandayu charkhzananda va gayra Relshoi nisbatan sabuk, dar baze mavridho Relshoi tarhashon makhsusro istifoda mebarand.