Monga chinthu chofunikira chomwe chimathandizira moyo ndi kuyaka, komwe kumakhala gawo limodzi mwa magawo asanu amlengalenga, mpweya nthawi zambiri umaphatikizidwa ndi acetylene, haidrojeni, propane, ndi mpweya wina wamafuta kuti apange lawi lotentha lomwe limagwiritsidwa ntchito popanga zitsulo. Amagwiritsidwa ntchito kwambiri popanga zitsulo, kuphatikiza ...
Werengani zambiri