Mu 1951, kampani ya 3m ku United States idapanga pepala lotentha, patatha zaka 20, chifukwa vuto la ukadaulo wa chrosomal sunathetsedwe, kupita patsogolo kwachedwa. Kuyambira 1970, miniaturization ya zinthu zowoneka bwino, kukweza kwa makina a fakisi ndi chitukuko cha utoto watsopano wa utoto wachita bwino. Mapepala owonda agwiritsidwa ntchito pojambula zithunzi, zosemphana ndi makompyuta ndi chosindikizira.
M'zaka pafupifupi 100 zapitazi, ndikukula kwachuma, kugwiritsa ntchito pepala la oterera lagwiritsidwa ntchito pang'onopang'ono pa hotelo yayikulu, kusindikiza kwa malamulo operekera, kufotokozera kwa mkaka, zilembo za tiyi ndi misika ina.
Ndiye pepala la mafuta limapangidwa bwanji?
Choyamba, ndikofunikira kugwiritsa ntchito pepala lam'munsi ndi tinthu yofalikira tinthu tating'onoting'ono pofotokoza kaye za chinenerochi choyambirira, ndikupanga choyambirira pofotokoza; Pambuyo pouma, zokutira ndi tinthu tating'onoting'ono zimagwiritsidwa ntchito popanga chisanachitike chachiwiri, kupanga chophimba chachiwiri; Pambuyo pouma kachiwiri, zokutira kwachiwiri pachimake pamwamba, mapangidwe okutidwa ndi chikatontho, pamapeto pake, pepalalo likhoza kukhala.
Post Nthawi: Jul-25-2022