Mwina ndinu trolley mtundu wogula ultrasound yogula manejala, omwe akufuna mtundu wapamwamba wa Trolley wapamwamba , ndipo wowerengeka ndi wopanga akatswiri & wotsatsa zomwe angakwaniritse zosowa zanu. Osati ma trolley a Troller okha ndi omwe tidapanga tatifotokozera Timapereka pa intaneti, nthawi ya nthawi yake ndipo mutha kupeza chitsogozo cha akatswiri pa Trolley Conlound ultrasound . Osazengereza kulumikiza nafe ngati mukufuna trolley mtundu wowoneka bwino , sitingakukhumudwitseni.