The synthetic quartz is used as oscillater and filter in various places and fields. The synthetic quartz is raised using the autoclave. An autoclave is oblong and cylindrical furnace. Inside of it becomes high tem-perature and pressure, and it is not possible to observe the condition of inside. Therefore, the period of the end has been decided by the intuition of the expert. To judge the end of rearing, we use trajectory parallel measure that was a method for applying the chaos.
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