Amapayipi ensimbi ngaphambili asetshenziswa kabanzi ekwakheni, ekufakeni amapayipi, ezimbonini zamakhemikhali, ezolimo, nakweminye imikhakha, lapho izinga lawo lithinta ngqo ukuphepha kwephrojekthi kanye nempilo yokuphila.Ngakho-ke, ukulawulwa kwekhwalithi okuqinile nokuhlolwa kwala mapayipi ensimbi kubalulekile....
Funda kabanzi