Prezentul standard stabile?te formele ?i ditnensunile reduc?iilor ctt muf? de gresie ceramic? glazurat? folosite pentru evacuarea, prin curgere liber?, a apelor reziduale care con?in acizi ?i alcalii, la temperaturi p?n? la 150°C.
STAS 1743/5-1990 history
1990STAS 1743/5-1990 Ceramic sand rock tubes and connccting pieccs CROSSOVERS Shapes and dimensions