. American engineer . SecHon Self-Centerjng Guide for Piston Rod Extension Wliich IVIay Be Removed and Replaced Without Lining Up. secured to the cylinder head. The circular face of the guide ing surface to insure continuous service for 2 or 3 years without registers with a corresponding face on the front cylinder head. requiring adjustment to linings or repairs of any kind. Further- The guide surface is struck from the center of the cylinder more, the guide surface being concentric with the center of the

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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroa, bookyear1912