Mashandisirwo akajairika ekuyerera anoputika-asingabvumi maheater emagetsi ndeaya: 1. Zvigadzirwa zvemakemikari muindasitiri yemakemikari zvinopisa nekupisa, mamwe mapfudzi anoomeswa pasi pekumanikidzwa kwakati, maitiro emakemikari uye kupfapfaidza kuomesa.2. Hydrocarbon heat, kusanganisira petroleum crude oil, heavy oil, fuel...
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