Ukutywinwa kwinqanaba lokuqala lophuhliso lwetekhnoloji
Phakathi kowe-1926 no-1933, umyili nomatshini waseDenmark uNielsA Christensen waphuhlisa ngakumbi waza wasebenzisa olu hlobo lwesangqa.Indlela yakhe (i-O-ring) yapapashwa ngo-1930, inelungelo elilodwa lomenzi ngo-1933, kwaye yaphumelela ibhaso elikhulu ngo-1938.
Ixesha lokuposa: Nov-07-2022
