{"version":"1.0","type":"rich","provider_name":"EbookNetworking","provider_url":"https://www.ebooknetworking.net","title":"Helical Spring Tables - An Easy-To-Use Index of Ready-Designed Compression and Tension Springs from Which Selections May Be Made with Minimum Calculat","author_name":"John D. Gayer","thumbnail_url":"https://www.ebooknetworking.net/books/144/652/big1446525449.jpg","thumbnail_width":330,"thumbnail_height":500,"html":"<a href=\"https://www.ebooknetworking.net/books_detail-1446525449.html\">Helical Spring Tables - An Easy-To-Use Index of Ready-Designed Compression and Tension Springs from Which Selections May Be Made with Minimum Calculat</a>","width":400,"height":300}