Ukutholakala kwe-jib crane ehlala isikhathi eside evela eChina kufaka isandla ekusebenzeni okuthuthukisiwe nasekuphepheni kumaphrojekthi wokwakhi e. Lawa ma-cranes akhethekile aklanyelwe ukusebenza ezindaweni ezisemadolobheni ezivalelwe ngenkathi igcina ukusebenza okungaguquguquki ngaphansi kwezimo ezifunayo.