Koodu Harmonized System mba ụwa a na-eji ahazi ngwaahịa maka ebumnuche kọstọm.
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Koodu HS (Harmonized System) bụ usoro nhazi ngwaahịa mba ụwa nke World Customs Organization (WCO) mepụtara. Ọnụọgụ isii mbụ bụ otu n'ụwa niile; mba dị iche iche na-agbakwunye ọnụọgụ nke ha n'elu ya. Na Turkey, a maara koodu a dịka GTİP.
Koodu ziri ezi na-ekpebi ụtụ kọstọm metụtara ya, mmachi mbubata na akwụkwọ achọrọ, ya mere ọ bụ ihe amamihe ịkwado nhazi ngwaahịa ya na onye nnọchite kọstọm.