三层共挤复合宽幅吹塑棚膜机组的膜泡内冷装置应用效果
삼층공제복합관폭취소붕막궤조적막포내랭장치응용효과
Effect on Application of Inner Cooling Device of Film Bubble Three-layer Coextrusion Film Blowing Unit for Wide-width Shed Film
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