Kuti mukwaniritse ntchito zobowola bwino, zotetezeka komanso zokhazikika, zinthu zotsatirazi zitha kuganiziridwa: Khalani ndi ukadaulo wapamwamba kwambiri ndi zida: Sankhani ndikugwiritsa ntchito ukadaulo waposachedwa kwambiri wobowola, monga makina obowola bwino, zobowola zapamwamba ndi madzi obowola, automa. .
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