There is great difficulty in the desulfurization technology for wet phosphoric acid purification.
湿法磷酸净化脱硫技术难度大。
Low and middle grade diatomite purification is of great importance in its industrial use development.
中低品位硅藻土提纯在其工业应用开发中有着重要意义。
The sea is great, except that it beautiful, magnificent, magnanimous, there is a self-purification function.
大海之所以伟大，除了它美丽、壮阔、坦荡外，还有一种自我净化的功能。
The sea is great, except that it beautiful, magnificent, magnanimous, there is a self-purification function.
大海之所以伟大，除了它美丽、壮阔、坦荡外，还有一种自我净化的功能。
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