Boyin amachitira makina aliwonse, mphuno iliyonse ili ndi chisamaliro.Maphuno ali ngati ana athu, amafunikira chisamaliro chosamala, choleza mtima komanso chodekha. Kenako, a Boyin apitiliza kufotokozera momwe angasungire makinawo ndi ma nozzles m'nyengo yozizira② Samalirani osankhidwa osasunthika.
Ubwino wa mankhwalawa ndi wabwino kwambiri, wogwirizana ndi kufotokozera kwa wogulitsa.Ndizoposa zomwe timayembekezera. Tikuyembekezera mgwirizano wotsatira.