对管理面板的 css 进行了改进，另外各方面的稳定性也感到明显的增强，在 Firefox 下所见即所得编辑器偶尔无法启动的问题也得到明显的改善 -Css panel on management has improved, other aspects are also significantly enhanced the stability, under the WYSIWYG editor in Firefox occasionally not start, issues have been

多种受力情况下压杆稳定性校核，自己编写的课程设计-Stability under various stress situation of checking bar