should be selected grinding and profile grinding wheel hard to maintain the required shape precision grinding.
2013年8月19日星期一
TSP source
Some of the TSP sources and natural sources of the points. Anthropogenic sources are mainly coal, oil, industrial process emissions from human activities such as; natural sources is mainly soil, dust, Polycrystalline diamond by wind action into the air and form.
The composition of the atmosphere of TSP is complex and varies greatly. Coal dustcubic boron nitride, industrial emissions of dust and ground dust in the atmosphere is an important source of total suspended particulates
订阅:
博文评论 (Atom)
没有评论:
发表评论