| 21. | It's just that they are not cost-effective when compared to internal combustion engines.
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| 22. | But the passing of the internal combustion engine undercut their attempt.
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| 23. | Hybrid vehicles save gasoline by supplementing internal combustion with electrical power.
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| 24. | But the internal combustion engine is a known and proven technology.
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| 25. | By 1850, the internal combustion engine existed that is still in use today.
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| 26. | For now, however, the internal combustion engine will continue to rule.
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| 27. | Splash lubrication was also used on the first internal combustion engines.
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| 28. | Booth created a large device, driven by an internal combustion engine.
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| 29. | They tend to have a better weight-to-horsepower ratio than other internal combustion engines.
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| 30. | To continue with the internal combustion metaphors, WebCompass is more of an 18-wheeler.
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