Na’urorin Kyankyasar Ƙwai na Masana’antu (Ƙwai 500–1000)
Wannan rukuni ya ƙunshi tsarin na’urar kyankyashe ƙwai mai babban ƙarfin ɗauka wanda aka tsara don samar da kaji a matakin kasuwanci da kuma sarrafa kyankyasa cikin tsari.
An gina waɗannan tsarin ƙarfi mai yawa don ingantaccen aiki na dogon zagaye, suna tallafawa aiki da wutar AC, ajiyar baturi, da muhalli mai haɗa makamashin hasken rana.
