High frequency apparatus, design, construction and practical application; a practical treatise for electrical engineers, electricans, physicians, students and experimenters (1920)
Curtis, Thomas Stanley · New York, Norman W. Henley publishing company · leaf 195
between the spring and the wood to prevent themetal coming into contact with the wood. When the four units have been made as described,they are to be connected up as shown in Fig. 103, the con-necting leads being strips of copper ribbon. The settingup will receive due attention when the rest of the…
Electric apparatus and appliances
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