
salam, man daneshjooye mohandesi shimi hastam. gerayesham tarahiye farayand hast. man taze ozve in site shodam. mishe ye matlabi,maghaleyi, ya hade aghal ye ketabi vase man moarefi konin ke man betoonam porojemo tahvile ostd bedam.(mozooye poroje : [system haye mokhtalef dar elemen giri va ertebate beyne system haye kartezian , ostovaneyi, va koreyi]). kheyli mamnoonam