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isa:436735269
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This invention relates to a four-cycle spark-ignition internal combustion engine characterized by combining both (1) a measure in which the burnt gas remaining in the cylinder at the end of the exhaust stroke is replaced by a gas, such as exhaust gas, which is at a temperature approximating normal temperature and, (2) a measure in which, when a knocking limit ignition point exists, the ignition
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isap:281611034
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isa:436735269