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Steam Cylinders! - Pennsylvania A3 Switcher, Part 45

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Tender Stairs - Pennsylvania A3 Switcher, Part 27

Beginners' Guide to Boring Heads

Cylinder Heads - Pennsylvania A3 Switcher, Part 48

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How a Steam Locomotive Works (Union Pacific "Big Boy")

Cylinder Covers - Pennsylvania A3 Switcher, Part 49

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Restoration AIRPORT Gennerator | Restoration Engine УД2 М1 CCCP