Lekholong la bobeli la lilemo BC, Chaena e sebelisitse basebetsi 'me e sebelisitse matla a ho phutholla a lehlaka ho etsa hore karolo ea ho phutholla ea khoune e ame mobu ho cheka. Hamorao, e ile ea sebelisoa mahaeng a Chaena ka nako e telele. E bile feela lilemong tsa bo-1950 moo lirigi tsa ho phutholla tsa thapo ea terata li ileng tsa hlahisoa ho tsoa linaheng tse ling. Mathoasong a bo-1960, lirigi tse bonolo tsa ho phutholla liliba tsa metsi tse kang likhoune tse kholo le tse nyane tsa lipitsa le likhoune tsa punch-grab li ile tsa ntlafatsoa. Hoo e ka bang ka 1966, rigi ea ho phutholla ea potoloho e ntle e ile ea qala ho ntlafatsoa, rigi ea ho phutholla ea potoloho e ka morao le rigi ea ho phutholla ea compound li ile tsa ntlafatsoa ka katleho hoo e ka bang ka 1974, 'me rigi ea ho phutholla ea rotary e thothomelang e theohelang ka tlase e ile ea thehoa bofelong ba bo-1970. Linaha tsa Europe le Amerika li ne li sebelisa haholo-holo lirigi tsa ho phutholla tsa thapo ea terata lekholong la bo19 la lilemo. Lilemong tsa bo-1860, Fora e ile ea sebelisa lirigi tsa ho phutholla tsa rotary tse potolohang, tseo hamorao li ileng tsa hlahisoa United States 'me tsa ntlafatsoa ka potlako. Lilemong tsa bo-1950, nts'etsopele ea lirigi tsa ho phutholla tsa rotary tse potolohang tse potolohang tse potolohang tse potolohang tse potolohang e qalile. Hamorao, ho ile ha hlaha mechine ea ho cheka e potolohang e sebelisang moea o hatelletsoeng ho e-na le seretse e le sesebelisoa sa ho hlatsoa liliba. Lilemong tsa bo-1970, mechine ea ho cheka e potolohang ea hlooho ea motlakase oa hydraulic e ile ea ntlafatsoa.
Nako ea poso: Mmesa-26-2021
