Incazelo nezici zesiphethu segesi: Uhlobo lokucindezelwa kwegesi intwasahlobo, eyaziwa nangokuthi induku yokusekela, inobude bokusekela neminye imisebenzi.Isekelwe ikakhulukazi kumfutho ophezulu, igesi engasebenzi (nitrogen) njengamandla, ngokufaka kalula, ukusetshenziswa okuphephile, akukho sondlo, ...
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