Unbalanced train segments for Engine starting

The sound of an engine starting from rest, which may involve a specific starter mechanism (as in a standard car).

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We estimate this class has high quality

In a random sample of videos for this class, we found 7 / 10 (70%) were accurate. Note that quality in the unbalanced training set may be significantly lower. Learn more.
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Unbalanced train videos for Engine starting (988)