Mbiri ya chitukuko cha maluwa osatha
Mbiri yakukula kwa maluwa osatha imatha kuyambika kumapeto kwa zaka za m'ma 1900 ndi koyambirira kwa zaka za zana la 20. Poyamba, anthu anayamba kugwiritsa ntchito njira zowumitsa ndi kukonza maluwa kuti asunge maluwa kuti asangalale chaka chonse. Njirayi idawonekera koyamba m'nthawi ya Victorian, pomwe anthu adagwiritsa ntchito ma desiccants ndi njira zina zosungira maluwa kuti azikongoletsa ndi zikumbutso.
M'kupita kwa nthawi, njira yowumitsa maluwa yakhala yokonzedwa bwino komanso yangwiro. Mu theka lachiwiri la zaka za m'ma 1900, ndi kupita patsogolo kwa sayansi ndi luso lamakono komanso kufufuza kosalekeza kwa teknoloji yosungira maluwa, teknoloji yopanga maluwa.muyayamaluwa asinthidwanso. Njira zatsopano zogwirira ntchito ndi zipangizo zimalola kuti maluwa amuyaya awoneke ngati enieni komanso okhalitsa.
M'zaka zaposachedwa, maluwa osatha akhala otchuka kwambiri chifukwa chogwiritsanso ntchito. Panthawi imodzimodziyo, luso lopanga maluwa osafa limakhalanso lopangidwa nthawi zonse kuti likwaniritse zofuna za msika za maluwa achilengedwe komanso osamalira zachilengedwe. Njira zamakono zopangira maluwa osatha zikuphatikizapo mankhwala osiyanasiyana ndi zipangizo kuti zitsimikizire kuti maluwawo amasunga maonekedwe awo owala kwa nthawi yaitali.
Chifukwa chiyani musankhe maluwa a Afro?
1, malo athu obzala m'chigawo cha Yunnan amakhala opitilira 300000 masikweya mita
2, 100% maluwa enieni omwe amakhala zaka zoposa 3
3, Maluwa athu amadulidwa ndikusungidwa pachimake kukongola kwawo
4, Ndife amodzi mwamakampani otsogola pantchito zosungidwa zamaluwa ku China
5, Tili ndi fakitale yathu yolongedza, titha kupanga ndikupanga bokosi loyenera kwambiri pazogulitsa zanu.
Kodi kusunga muyaya maluwa?
1, Osawalowetsa m'mitsuko yamadzi.
2, Asungeni kutali ndi malo achinyezi ndi malo.
3, Osawayika padzuwa lolunjika.
4, Osawaphwanya kapena kuwaphwanya.