ukwakhiwa kwezimboni kwenziwa ngokucindezela noma ngezando ezinikezwa umoya ocindezelweyo, ugesi, ama-hydraulic noma isitimu. Lezi zando zingase zibe nezisindo eziphindaphindayo ezinkulungwaneni zamaphawundi. Izando zamandla ezincane, 500 lb (230 kg) noma isisindo esiphindaphindayo esingaphansi, kanye nokucindezela okudonsa amanzi kuvamile kuma-art smithies futhi. Ezinye izando zesitimu zisasebenza, kodwa zaphelelwa yisikhathi ngenxa yokutholakala kwezinye, ezilula, imithombo yamandla.
Isikhathi sokuthumela: Apr-27-2020