Kuyesa kwa Madzi Otchinga Madzi osefukira

Kuyesa kwa Madzi kwa Chotchinga Chigumula pambuyo pa Kuyika

Ntchito iliyonse idzayesedwa madzi kuti ivomerezedwe pambuyo pa kukhazikitsa.

Kuyesa madziya hydrodynamic automatic flood barrier ku Beijingg Metro.

kufunsa zambiri