如含蜡质、沥青较多的石油等被控介质，防止介质的结晶，确保自控系统高效运转。
Such as those containing wax, oil, asphalt more charged the media to prevent crystallization of the media, to ensure efficient operation of the automatic control system.
如含蜡质、沥青较多的石油等被控介质，防止介质的结晶，确保自控系统高效运转。
Such as those containing wax, oil, asphalt more charged the media to prevent crystallization of the media, to ensure efficient operation of the automatic control system.
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