{"version":"1.0","type":"rich","provider_name":"EbookNetworking","provider_url":"https://www.ebooknetworking.net","title":"IEC 60153-4 Ed. 2.0 b:1973, Hollow metallic waveguides - Part 4: Relevant specifications for circular waveguides","author_name":"IEC TC/SC 46F","thumbnail_url":"https://www.ebooknetworking.net/books/B00/0Y2/bigB000Y2SF10.jpg","thumbnail_width":330,"thumbnail_height":500,"html":"<a href=\"https://www.ebooknetworking.net/books_detail-B000Y2SF10.html\">IEC 60153-4 Ed. 2.0 b:1973, Hollow metallic waveguides - Part 4: Relevant specifications for circular waveguides</a>","width":400,"height":300}