ass日本风韵熟妇pics男人扒开女人屁屁桶到爽|扒开胸露出奶头亲吻视频|邻居少妇的诱惑|人人妻在线播放|日日摸夜夜摸狠狠摸婷婷|制服 丝袜 人妻|激情熟妇中文字幕|看黄色欧美特一级|日本av人妻系列|高潮对白av,丰满岳妇乱熟妇之荡,日本丰满熟妇乱又伦,日韩欧美一区二区三区在线

50%左右,。 Moisture of extruder feed material,heating temperature of extruder barrel and rotation speed of extruder screw were considered as factors;tannin content was employed as evaluation index. With the aid of the combination design of quadratic orthogonal rotation, the regression equation was established,the single factor and response surface methodology were used to demonstrate the influential rules of test factors to the index changes,and the contribution rate of factors to the index was investigated, the extruder condition of lower tannin content was fixed by the frequency analysis. The results show that the tannin content decreases to 50% when heating temperature of extruder barrel is 50℃，rotation speed of extruder screw is 166 r/min and moisture of material is 25%. 