{"version":"1.0","type":"rich","provider_name":"EbookNetworking","provider_url":"https://www.ebooknetworking.net","title":"Safety valve efficiency: With calculations of capacity & proportions of Grosby locomotive pop safety valves with guideless disc","author_name":"Alfred B. Carhart","thumbnail_url":"https://www.ebooknetworking.net/books/B00/3HN/bigB003HNO8ZK.jpg","thumbnail_width":330,"thumbnail_height":500,"html":"<a href=\"https://www.ebooknetworking.net/books_detail-B003HNO8ZK.html\">Safety valve efficiency: With calculations of capacity &amp; proportions of Grosby locomotive pop safety valves with guideless disc</a>","width":400,"height":300}