Voterdical hard ndi makina osinthika ndi ogwira ntchito osinthika amapangira kusakaniza ndi kuzika zinthu zosiyanasiyana, monga ragala, pulasitiki, zomata, ndi mankhwala.
Makina ofukiza osakanikirana ndioyenera mapangidwe owoneka bwino, zida zamphamvu kuposa kutsuka kwa mapulaneti. Ili ndi maubwino a yunifolomu yosakanikirana, palibe mbali yakufa komanso yolimba kwambiri.
Zovala zolumikizira zotchinga nthawi zonse zimachita mamanda ndikusambitsa kudzera pakusintha kwa masamba awiri. Imapereka mphamvu yotopetsa, yofinya mphamvu ndi mphamvu yamwambo, kuti zinthu zitheke kuti zitheke kwakanthawi kochepa. Ndioyenera madola, ma nthito a mpweya, zokutira, zojambula zojambula, ndi zina zambiri