Poster color educational No. 28d Scheme of steam distribution for locomotive SO

Poster color educational No. 28d Scheme of steam distribution for locomotive SO

Drawing: cross-section, position 7 - cutoff 0.5 (piston stroke back), position 8 - cutoff for steam release (piston stroke back). On the reverse side, in the lower right corner - round stamp.

 

Creation time: 1936-1938 yy. (?)

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