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Definition of 4-4-4-4
1. Noun. Under the Whyte notation system, a duplex steam locomotive that has four leading wheels in a leading truck, two sets of four driving wheels, and a four-wheel trailing truck. ¹
¹ Source: wiktionary.com
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1. Noun. Under the Whyte notation system, a duplex steam locomotive that has four leading wheels in a leading truck, two sets of four driving wheels, and a four-wheel trailing truck. ¹
¹ Source: wiktionary.com