Oyenda a RV ayenera kukhala ndi zida zina zofunika, kuphatikizapo: 1. zida zogwiritsira ntchito malo: monga mabokosi osungiramo zinthu, zophimba, mashelefu, ndi zina zotero. 2. Zipangizo zakukhitchini: monga firiji, chitofu cha gasi, uvuni, chotenthetsera madzi, etc. 3. bafa zida: monga chimbudzi, zida zosambira ...
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