Ukukhethwa kwe-valve kuqala ukuze ukwazi ukusebenza kahle kwabezindaba, izici zokugeleza, kanye nezinga lokushisa, ingcindezi, izinga lokugeleza, ukugeleza, nokunye ukusebenza, bese, kuhlanganiswe nenqubo, ukusebenza, izici zokuphepha, khetha uhlobo oluhambisanayo, isakhiwo. , uhlobo kanye nokucaciswa kwe ...
Funda kabanzi