Scientific American. 405 placed in position. going on without the least interruption to the regular | T-rail is bolted. … of three steel plates, the are the standard construc- 1—LAYING DUCTS FOR ELECTRICAL EQUIPMENT OF BROADWAY CABLE ROAD. outer plates being % inch tion for all the new electric roads. On the Broadway and the inner plate ; inch Within this cup] them by flexible cables. the conduit. which keep the shoes…
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