kya apko pata he ki railway track par kyo patathar hote he

          Apko train me safar karne ka mjahi ata he par ap jabhi train me safar karte he tbhi apke manme a saval ata hoga ki patri ke nise patathar kyo hote he

Kya he patathar ka raj:-

          Train salti tab patri pe kapan hota he , patri ke nise lakdiki plat hoti he vo patri KO jakdake rakti patathar ki vajah se lakdi fisalti nahi he or train ka pura jor lakdi par ata he Jo age jakar pur bhar patatharo jolleta he or train ka bhar or kapn dono sabhal jata he
             Patathar ki vajah se patri Jamin me nahi bedhati or bhari barish ki vajah se pani bhi nahi patri par rukta he