{"version":"1.0","type":"rich","provider_name":"EbookNetworking","provider_url":"https://www.ebooknetworking.net","title":"Drum armatures and commutators, theory and practice : a complete treatise on the theory and construction of drum winding, and of commutators for ... principal points involved in their design; a","author_name":"F Marten Weymouth","thumbnail_url":"https://www.ebooknetworking.net/books/B00/9WW/bigB009WW505W.jpg","thumbnail_width":330,"thumbnail_height":500,"html":"<a href=\"https://www.ebooknetworking.net/books_detail-B009WW505W.html\">Drum armatures and commutators, theory and practice : a complete treatise on the theory and construction of drum winding, and of commutators for ... principal points involved in their design; a</a>","width":400,"height":300}