Iyo mhepo sefa inokurudzirwa kuchinjwa kamwe pagore kana 10000-15000 km. Basa remhepo yekufefetera ndere: 1, kupa mweya mutsva mumotokari; 2, adsorption yehunyoro uye zvinhu zvinokuvadza mumhepo; 3, chengetedza mhepo yakachena haizobereke mabhakitiriya, kuve nechokwadi chekuchengetedza uye hutano; 4......
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