Now, the temperature of external air is reduced 15-20 degrees from the normal 25-34 degrees and is moisture-dropped as well. With the humidity in the room drops below clean up standards. That this did not "occur frequently. Expected to occur, the date range 25-jan 27, 2016 (according to a report of the Meteorological Department). When the external air temperature and humidity into the normal State would cause the moisture in clean room according to the standard value.
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