Buku lokonza ma valve a butterfly la China: malangizo owonjezera moyo wautumiki

Buku lokonza ma valve a butterfly la China: malangizo owonjezera moyo wautumiki

Valavu ya butterfly ngati chida chowongolera madzimadzi chomwe chimagwiritsidwa ntchito nthawi zambiri, kukonza kwake ndikofunikira kukulitsa moyo wautumiki. Nkhaniyi ikupatsirani buku lothandizira kukonza ma valve agulugufe waku China kuchokera kwa akatswiri kuti likuthandizeni kumvetsetsa momwe mungakonzere ma valve agulugufe waku China kuti atalikitse moyo wawo wantchito.