http://www.struers.com/default.asp?top_id=5&main_id=156&sub_id=220&doc_id=911&admin_language=20 http://www.newimiue.ipnet.pl/dokumenty/twardosc.pdf https://web.archive.org/web/20151025011753/http://www.pracownia.zsz.tuchola.pl/pm.htm https://web.archive.org/web/20160306182547/http://www.struers.pl/default.asp?top_id=0&main_id=0&sub_id=0&doc_id=470&admin_language=20
Linki zewnętrzne porównanie wgłębników Knoopa i Vickersa
Kategoria:Wytrzymałość materiałów