A yau, lokacin da fasaha ke haɓaka zamantakewa da tattalin arziƙi, ana amfani da na'urori masu sarrafa mutum-mutumi a fagage da yawa, kamar masana'antar kera motoci, masana'antar sarrafa ruwa, sabbin masana'antar makamashi, da sauransu, kuma suna da ƙima sosai.Idan aka kwatanta da ƙarfin ɗan adam, aikin mutum-mutumi ya...
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