Ivalve yebhola yokukhupha umoya
Ivalve yebhola yokukhupha umoya
1,Yila kwaye wenze:GB/T12237-1989;
2,Ukuhlolwa kunye novavanyo:GB/T13927-1992;
3 ,Fuxhulumaniso olude:GB/T9115.1-2000.
4,Umyinge wobuso ngobuso:JD-2002.
Bhala umyalezo wakho apha kwaye uwuthumele kuthi