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The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.
an obsolete type of internal-combustion engine in which the gas mixture is ignited by a hot bulb (ignition bulb). Structurally, the hot bulb is the removable noncooled part of the combustion chamber of a hot-bulb engine.
The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.