Modern switchboards and the appliances used thereon; together with an historical re?sume? of early practices and expedients, indicating the advance recently made in this class of electrical apparatus; and data on approved methods of construction
Автор: Herrick, Albert Bledsoe, 1862-,Cutter Company (Philadelphia, Pa.), 239 стр., издатель: "Книга по Требованию", ISBN: 978-5-8836-4682-8


4 из 5, 1 голос(-ов).