Umklamo wesayensi uletha isakhiwo esifanelekile, ukubukeka okulula nokuhle kule yunithi kuyilapho amashubhu ayisikwele asezingeni eliphezulu asetshenziselwa uhlaka ehlanganiswe kahle futhi ahlanganiswe ukuze alethe ukuphepha nokuqina. Indlela yokuhamba ehambisana nesimiso se-ergonomics kanye nezintambo zensimbi zekhwalithi ezisakazwa ngokwesayensi ziletha izinga eliphezulu lenduduzo nokuphepha.
Indwangu ivikela abasebenzisi ngokuphelele ezitsheni zokulinganisa isisindo futhi ithuthukisa ukuphepha kokusetshenziswa. Ama-bearings aphezulu asetshenziselwa izixhumanisi aletha ukunyakaza okubushelelezi. Izibambo zesandla eziklanywe kahle ezinezinga eliphezulu lenduduzo zenza kube lula ngabasebenzisi ukuzikhandla bese beletha ukunyakaza okubushelelezi.