Unfortunately, this air-tight seal is often hard to maintain, especially if passengers want to walk between cars. 不幸的是,这种密封的状况经常很难保持,特别是当乘客想要在车厢之间走动的时候。
This review gives working mechanism of disc reactor shaft seal and points out the major factors that could improve air-tight seal effect. Besides it introduces some improvements on shaft seal. 叙述了圆盘反应器轴封的工作原理,指出了影响轴封密封效果的主要因素并介绍轴封的改进措施。