Incazelo Yomkhiqizo:
I-1.Ingaxhunywa kunoma yisiphi isikhundla esinezimbobo nokuphakama okufanele.
2.Ingakwazi ukuqedela ukuqeqeshwa ngokomzimba okuhlukahlukene nge-barbell.
3.Ifakwe ama-transverse kanye nama-longitudinal bearings, ukuze ikwazi ukuzungeza i-180 ° transverse kanye ne-longitudinal.