Ukubethelwa ngenye yezona zinto zisetyenziswa ngokuqhelekileyo kumatshini, zithwele ukujikeleza kunye nokunyakaza okuphindaphindiweyo kwe-shaft, ukulungelelanisa ukuhamba kwe-shaft kunye nokuxhasa.Ukuba iibheringi zisetyenzisiwe, ukungqubana nokuguga kunokuncipha.Kwelinye icala, ukuba umgangatho wokuthwala uphantsi, uya...
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