Milandu Yoyezetsa Madzi

Kuyesedwa kwa Madzi kwa Chipata Chachigumula Pambuyo Kuyika

Ntchito iliyonse idzayesedwa madzi kuti ivomerezedwe pambuyo pa kukhazikitsa.

Kuyesa madziya hydrodynamic automatic flood barrier ku Beijingg Metro.

kufunsa zambiri