While at lower temperature, apparent density increases with the increasing of screw revolution speed.
而较低的温度下，表观密度随螺杆转速的提高而增大。
Therefore, lower extrusion temperature and higher screw revolution speed will leads to low foamed HIPS products with good performance.
综上，我们得出：选择较低的挤出温度及较高的螺杆转速有利于得到性能较好的低发泡制品。
Therefore, lower extrusion temperature and higher screw revolution speed will leads to low foamed HIPS products with good performance.
综上，我们得出：选择较低的挤出温度及较高的螺杆转速有利于得到性能较好的低发泡制品。
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