九九在线视频精品福利_鉴黄师免费下载app_国产黄a大片真人免费观看_亚欧免费无码?Ⅴ在线观看_被暴雨淋湿的上司躲雨中文字_悠悠中文字幕亚洲精品_人与动另类z0z0欧美视频_一级 片内射视频播放_色婷婷久久综合一区二区三区_gogogo高清在线观看中国

When winding up the film, due to the action of tension and pressure of the roller, its shaft bottom. The branch is subjected to a very large internal pressure, prone to wrinkles and deformation. The effect of attenuation is to reduce the relative winding tension and roller pressure as the winding diameter increases.

The attenuation curve is generally based on the winding diameter and winding tension. The greater the attenuation value, the faster the tension will decay, and the smaller the internal pressure under the same tension pressure. According to different materials, the selection of appropriate tension, pressure and attenuation values plays a key role in reducing the wrinkles of the shaft bottom.