49 C.F.R. § 236.817 Switch, electro-pneumatic.
Title 49 - Transportation
A switch operated by an electro-pneumatic switch-and-lock movement.
Title 49: Transportation
PART 236—RULES, STANDARDS, AND INSTRUCTIONS GOVERNING THE INSTALLATION, INSPECTION, MAINTENANCE, AND REPAIR OF SIGNAL AND TRAIN CONTROL SYSTEMS, DEVICES, AND APPLIANCES
Subpart G—Definitions
§ 236.817 Switch, electro-pneumatic.