Ndi kukwezedwa kwa mfundo zoyendetsera magetsi pogwiritsa ntchito malasha komanso kutentha koyera kumpoto, mpweya ukhoza kulowa m'malo mwa masomphenya a anthu ndikukhala m'malo mwa ma boiler oyaka ndi malasha ndi ubwino wa magwiridwe antchito apamwamba, zachilengedwe…
Nthawi yotumizira: Ogasiti-31-2022