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Using solvent discharging valve gear in the small mill barrel can make no material draffy remain in the barrel consequently reduce the waste. 体积较小的研磨内桶结合泻溶剂阀，使桶内几乎没有残留物料，减少浪费，对于中小订单的客户，更具有经济价值，满足更多客户的需求。