Shiryawa, kwandon sunan Ingilishi.Kayan aiki ne na kayan aiki wanda zai iya ɗaukar kaya ko kayan da ba a cika ba don sufuri, kuma ya dace don lodawa da saukewa tare da kayan aikin inji.

Nasarar kwantena ta ta'allaka ne a kan daidaita samfuransa da duk tsarin sufuri da aka kafa daga gare ta.Yana iya daidaita behemoth tare da nauyin ton da yawa, kuma a hankali ya gane tsarin dabaru da ke tallafawa jiragen ruwa, tashoshin jiragen ruwa, hanyoyi, manyan tituna, tashoshin canja wuri, gadoji, ramuka, da jigilar kayayyaki da yawa a duk duniya bisa wannan tushen.Wannan hakika yana da amfani.Ɗaya daga cikin manyan mu'ujizai da ɗan adam ya taɓa yi.

Naúrar lissafin kwantena, gajarta: TEU, ita ce taƙaitaccen sashin Ingilishi Ashirin daidai, wanda kuma aka sani da sashin jujjuya ƙafa 20, wanda shine sashin jujjuya don ƙididdige adadin kwantena.Wanda kuma aka sani da International Standard Box Unit.Yawancin lokaci ana amfani da shi don bayyana ƙarfin jirgi don ɗaukar kwantena, kuma yana da mahimmancin ƙididdiga da juzu'i don jigilar kaya da tashar jiragen ruwa.

Yawancin jigilar kwantena a kasashe daban-daban na amfani da kwantena iri biyu, tsayin ƙafa 20 da ƙafa 40.Don haɗa lissafin adadin kwantena, ana amfani da kwandon mai ƙafa 20 a matsayin naúrar lissafi ɗaya, kuma kwandon ƙafa 40 ana amfani da shi azaman raka'o'in ƙididdiga biyu don sauƙaƙe ƙididdige ƙididdiga ɗaya na adadin aiki na kwandon.

Kalmar da ake amfani da ita lokacin ƙidayar adadin kwantena: akwatin halitta, wanda kuma aka sani da "akwatin jiki".Akwatin halitta akwati ne na zahiri da ba a juyowa, wato ko kwandon kafa 40 ne, ko kwandon kafa 30, kwandon kafa 20 ko kwandon kafa 10, ana lissafta shi a matsayin akwati daya.