International Library of Technology · Scranton, International Textbook Co. · leaf 450
arcs,requiring daily trimming, are used. 94. Fig. 45 illustrates a typical mast-arm suspension.The general arrangement will at once be seen from thefigure. The lamp is raised and lowered by means of arope and pulleys, and is provided with a small hood /;to protect the top from the weather. The lamp… … Fig. 45. the lamp and the pole fixture and also to keep the linewires spread apart.
Electrical engineering
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