Molecular formula :
nature : all chemical reactions or the separation process, and requires a certain amount of time in order to achieve a certain purpose. It must be processed in the materials used by the devices to stay a certain period of time, known as the residence time. In fact some of the materials in the equipment of the residence time is not the same as the ordinary meaning of stay materials is the average residence time. If the stay of different materials were said to stay with the total share of the materials, will come to residence time distribution.
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