owly by a locomotive, and were used. struction. The poles are designed to withstand a wire paid out, and the boom was raised at each cross- The underground high-tension cables are of the wind pressure at right angles to the line correspond- arm, so that the wire would drop onto the arm.… … of the other set. mission line required that the outlying ends The Terminal Rack at Rockaway Junction. of transmission cables exposed to lightning calculated from data obtained in the Berfin-Zossen The use of concrete masonry probably begins with charges be provided with protective apparatus. Wher-…
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