设置对话框背景颜色，主要是对滑动条使用的练习-Settings dialog box background color, mainly on exercises using slider

adams 中弹簧挂锁的源文件，利用它可以完成参数化建模到实验设计的一系列练习，模型经过验证-adams in spring padlock source file, you can use it to complete the parametric modeling of a series of exercises designed to test the model validated