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U jar khadka dhererka
Khadka Goynta ee dhererka kaas oo loo isticmaalo furfurida, simida iyo goynta gariiradda birta ah ee dhererka loo baahan yahay ee alaabta xaashida siman iyo isugaynta gariiradda birta ah, gariiradda aluminium iwm galay ballac kala duwan si waafaqsan baahida wax soo saarka isticmaalaha iyo sidoo kale gooyay.