FF Series Vertical Knee-up imathandizira masewera olimbitsa thupi apakati komanso otsika. Mapadi opindika m'zigongono, zogwirizira m'manja ndi pad kumbuyo zimapereka bata pakuchita masewera olimbitsa thupi m'mawondo, ndipo kugwirizira m'manja kwina kumalola kuchita masewera olimbitsa thupi.
Machubu achiwiri komanso zoyambira zazikulu zimatsimikizira kukhazikika muzochita zonse zolimbitsa thupi.
Mapadi opindika, okhuthala kwambiri amapangidwa mwa ergonomically ndipo amapereka bata ndi chitonthozo pakuchita masewera olimbitsa thupi m'mawondo.
Malonda okulirapo, okhala ndi mabawuti, osapumira amathandizira ogwiritsa ntchito kulowa ndi kutuluka mu zida molimba mtima.
Machubu opangira zitsulo zolemera kwambiri amawokeredwa m'malo onse kuti athe kupirira malo ovuta kwambiri. Chimango chokutidwa ndi ufa.
Mapazi a mphira ndi okhazikika, amapereka kukhazikika kwa mankhwala ndikuthandizira kupewa kusuntha kwazinthu.