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Y42 Screw Feeder Is Used for Quantitative Feeding of Silica Sand, Coal Powder and Bentonite in Sand Mold Manufacturing, Find Details and Price about Screw Feeder Distributor from Y42 Screw Feeder Is Used for Quantitative Feeding of Silica Sand, Coal Powder and Bentonite in Sand Mold Manufacturing - Qingdao Sanzhuji Technology Co., Ltd.