The key equipment of a pilot plant to produce ultra-fine tourmaline powder with jet mill and stirred ball mill is described.

本文主要利用以气流磨和搅拌磨为主体的超细粉碎中试线，对电气石超细粉体的制备工艺进行了探讨。

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"Perhaps we could say that our universe has thrown us a curve ball, and it rarely fails to surprise us, " said Krzysztof Gorski, Planck scientist at NASA's Jet Propulsion Laboratory.

CNN: Better 'baby picture' of universe emerges