Last Updated：2025/11/21
Under the Whyte notation system, a duplex steam locomotive that has four leading wheels in a leading truck followed by four coupled driving wheels, a second set with six coupled driving wheels, and four trailing wheels in a trailing truck.
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4-4-6-4
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Source Word
4-4-6-4
Noun
Japanese Meaning
ワイト記法に基づき、先導トラックに4輪、最初の連結動輪に4輪、次の連結動輪に6輪、後部トラックに4輪を備えたデュプレックス式蒸気機関車を指す。
（ plural ）
