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PRUJINA

PRUJINA, f a n a r mekhanizmest, ki deformatsiya khurda, energiyai me­khanikiro furu menishonad yo khud onro gun va taqvil medihad. Prujinahoi qatshavanda, tobkhuranda, vaseshavanda (fishurdashavanda)-ro farq  mekunand; silindri, konusi, tabaqi, halqavi, lavhavi va gayra meshavad.

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SADUDDINI HAMMUI Muhammad ibni Juvayni

SADUDDINI HAMMUI Muhammad ibni Juvayni (soli tavallud nomalum — Vafot 1252), yake az namoyandagoni mashhuri …