Dakin sanyi sau biyu, wanda kuma aka sani da dakin sanyi mai duplex, an sanye shi da ma'ajiyar sanyi guda biyu, wadanda galibi ana amfani da su wajen adana kayan marmari, kayan lambu, nama da abincin teku.Yin amfani da wutar lantarki iri ɗaya a ƙarƙashin yanki ɗaya, yana iya saduwa da ayyuka daban-daban kamar adana kayayyaki, daskararru, da sabbin kayan adanawa.