Download or read book GB T 7216 2009 Translated English of Chinese Standard GBT 7216 2009 GB T7216 2009 GBT7216 2009 written by https://www.chinesestandard.net and published by https://www.chinesestandard.net. This book was released on 2016-01-22 with total page 25 pages. Available in PDF, EPUB and Kindle. Book excerpt: This Standard specifies the evaluation method of gray cast iron microstructure under optical microscope.