Malinga ndi kufunika kwa mavavu handwheel chimagwiritsidwa ntchito petrochemical, mafuta, chakudya, zakumwa, mankhwala ndi thanzi, magetsi, nsalu, kusindikiza ndi utoto, mankhwala madzi, kuteteza chilengedwe, nyumba madzi, kukatentha madzi makampani, kukapereka madzi kutentha si upambana digiri 180 .
Momwe mungagwirizanitsire valavu yapampu ndi gudumu lamanja likhoza kutengera mawonekedwe ake ogwirira ntchito, komanso kugwiritsa ntchito mankhwala ndi zina, zasayansi komanso zofananira zofananira ndi anzawo omwe amagwiritsa ntchito bwino kwambiri, kugwiritsa ntchito mphamvu zochepa, kuperekera zofunikira pazamalonda.
