Zoyenera magawo awiri kuphatikiza ma rivets a kapu, riveti yopanda kanthu, batani la snap, batani la snap ... etc.
1.Easy kugwira ntchito, kuchepa kwachangu, kuti muwonjezere zokolola ndi mtengo wotsika.
2.Ndi mbale zowonekera ndizosavuta kuti wogwiritsa ntchito ayang'ane mabatani a kuchuluka ndi kudzaza mbale kuti achepetse mlingo woyimitsa.Ndipo mbale zowonekera sizimva mafuta ndipo zimakhala zovuta kusweka.
3.Kukhala ndi kauntala ya manambala asanu ndi limodzi, ndizosavuta kuwerenga zomwe zimatuluka.
4.Kuchepetsa ewaring ndi phokoso ndi mafuta osambira.
5.Tungsten carbide imagwiritsidwa ntchito popanga ma dies ndi chunk kuti moyo wautumiki wakufa ukule.
6.Zokhala ndi makina opangira optical-fibre control omwe amawonetsa zizindikiro ndi IC, makinawo adzayima mu maminiti a 3 pomwe palibe mabatani kapena makinawo alibe dongosolo.Komanso, nyali ya alamu ndi kuwala kwa gulu kudzawala.