Modern locomotive engineering, with questions and answers .. (1913)
Swingle, Calvin Franklin, 1846- [from old catalog] · Chicago, F. J. Drake & co · leaf 410
Figure 192Crane Muffled PopValvesectional view INJECTORS, STEAM GAUGES, ETC. 403 center of the top plate on top of the spring-, and islocked with a key, and a jam-nut holding it firmly tois place, which makes it perfectly safe from beingtampered with.
Locomotives
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