Download or read book GB T 21354 2008 Translated English of Chinese Standard GBT 21354 2008 GB T21354 2008 GBT21354 2008 written by https://www.chinesestandard.net and published by https://www.chinesestandard.net. This book was released on 2020-05-16 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt: This standard specifies the method for measuring the tap density, that is, the powder in the container is tapped under certain conditions. Use a tapping apparatus to tap the specified amount of powder in the container until the volume of the powder cannot be further decreased. The mass of the powder divided by the volume is the tap density.