Hard and Soft Water Print
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Written by pimpitcha   
Monday, 03 March 2014 10:31

In this video learn about hard and soft water, the differences between these and where to find examples in everyday life.


ที่มา :  www.fuseschool.org

ลิงค์ : http://youtu.be/2Fr0V9SZ6R8

อัพโหลดโดย : FuseSchool - Global Education
Last Updated on Monday, 03 March 2014 10:32