{"version":"1.0","type":"rich","provider_name":"EbookNetworking","provider_url":"https://www.ebooknetworking.net","title":"Duct construction;: A handbook on the fabrication and installation of heating, ventilating and air conditioning ducts, round pipes, stacks, fittings, ... and taking off quantities of materials, etc","author_name":"O. W Kothe","thumbnail_url":"https://www.ebooknetworking.net/books/noimage.jpg","thumbnail_width":330,"thumbnail_height":500,"html":"<a href=\"https://www.ebooknetworking.net/books_detail-B0007EN272.html\">Duct construction;: A handbook on the fabrication and installation of heating, ventilating and air conditioning ducts, round pipes, stacks, fittings, ... and taking off quantities of materials, etc</a>","width":400,"height":300}