Isilayidi sedrowa sisifakelo sefenitshala eyimfuneko ekuvuleni okugudileyo okanye ukuvala idrowa. Udidi oloNgezelelweyo lweSilayidi sikaloliwe lubandakanya lonke uhlobo lwezilayidi zedrowa eziphindwe kathathu neziphindwe kabini zebhola, izilayidi zedrowa yokuvala ethambileyo, iSilayidi seSilayidi seMetal Box, izilayidi zedrowa yeFGV, isilayidi seSilayidi esiMfihliweyo njl.njl. , ngokuqinisekileyo sinokuyifumana le nto ubuyifuna ngokwenene.
Isilayidi sedrowa ye-Addith yenziwe ngentsimbi yodidi oluphezulu eqengqelekayo ebandayo, umzobo ogqwesileyo wokupeyinta umphezulu wonyango oluxhathisayo ekutsalweni kwaye aludleki lula.
Ukufaka imathiriyeli yokujiya iyonke yesilayidi sedrowa kunye nokusetyenziswa koyilo lwesampulu, ubugcisa obugqwesileyo bokwenza umkhondo wangaphandle nangaphakathi womelele. Ngokuhlola umgangatho ongqongqo, unokutsalwa ngokulula ngaphezu kwamaxesha angama-50,000. Ukusebenzisa i-desgin kwenza ukuba ihambe ngakumbi xa ityhala kwaye itsala idrowa. Sinokubonelela ngeendlela ezahlukeneyo zokukhetha imibala, kunye nobukhulu bezinto ezahlukeneyo zinokubonelelwa ukuhlangabezana neemfuno zabathengi kumanqanaba ahlukeneyo. Ukusetyenziswa kweendawo ezininzi, zilungele ngakumbi ukusetyenziswa kweedrowa ezinobunzima obunje ngeewodrophu, iikhabhathi zeencwadi, iitafile ezisecaleni kwebhedi, iidesika zekhompyuter, njl.