Masiku ano m'mafakitale othamanga kwambiri, kudalirika komanso kukhazikika ndizofunikira kwambiri pamakampani opanga zinthu.Timamvetsetsa izi ndikupanga ma valve athu apamwamba kwambiri padziko lonse lapansi.Poyang'ana pa kulimba, kulondola komanso kusinthasintha, ma valve athu amalonjeza kusintha machitidwe oyendetsa kayendetsedwe ka mafakitale.