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nature : under negative pressure in the drying equipment, with a steam jacket from the shell and the shell moves in the composition of tooth harrow. Harrow tooth can reversion, approximately every 10 to 15 minutes for one to make uniform material by mixing the surface, continually updated, gasification water (or solvent) out by the vacuum pump. Vacuum Dryer drying temperature can be lowered to prevent the decomposition of materials. Now widely used in chemical industry.
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