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B60M—POWER SUPPLY LINES, AND DEVICES ALONG RAILS, FOR ELECTRICALLY- PROPELLED VEHICLES
B60M1/00—Power supply lines for contact with collector on vehicle
B60M1/12—Trolley lines; Accessories therefor
B60M1/26—Compensation means for variation in length
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FR776795D1934-08-021934-08-02Appareil de réglage automatique de la tension mécanique des fils de contact d'une ligne aérienne de traction
ExpiredFR776795A
(fr)