Tan iyo markii ay soo baxday karbidhida sibidhka ee 1923, dadku waxay si joogto ah u wanaajiyeen hantidooda inta badan iyaga oo wanaajinaya geedi socodkeeda sintering, diyaarinta budada isku dhafan ee WC-Co, iyo xoojinta dusha sare.Si kastaba ha ahaatee, sababtoo ah dhibaatooyinka qalabka qalafsan, kharashka diyaarinta oo sarreeya, iyo te...
Akhri wax dheeraad ah