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</html><description>1. TRADITIONAL ENERGY SOURCES 1. Traditional energy sources 1.1 Power production 1.1.1. System solutions 1.1.2. Gas engines 1.1.3. Gas generators 1.1.4. Heat recovery units 1.2. Energy supply, storage, utilization 1.2.1. Fossil fuels 1.2.1.1. Carbon-based fuels 1.2.1.2. Oil supply 1.2.1.3. Gas supply 2. HEATING ENGINEERING 2.1. Self-contained heating appliances 2.1.1. Solid fuel-fired stoves 2.1.2. Oil- and [&hellip;]</description></oembed>
