{"version":"1.0","type":"rich","provider_name":"EbookNetworking","provider_url":"https://www.ebooknetworking.net","title":"ISO 128-21:1997, Technical drawings -- General principles of presentation -- Part 21: Preparation of lines by CAD systems","author_name":"ISO TC 10/SC 1","thumbnail_url":"https://www.ebooknetworking.net/books/B00/0Y2/bigB000Y2U9U0.jpg","thumbnail_width":330,"thumbnail_height":500,"html":"<a href=\"https://www.ebooknetworking.net/books_detail-B000Y2U9U0.html\">ISO 128-21:1997, Technical drawings -- General principles of presentation -- Part 21: Preparation of lines by CAD systems</a>","width":400,"height":300}