Unfortunately, this air-tightseal is often hard to maintain, especially if passengers want to walk between cars.
但不幸的是，这种高气密的设备不容易保养维护，特别是当乘客们想要在车与车之间走动时显得更为困难。
2
This review gives working mechanism of disc reactor shaft seal and points out the major factors that could improve air-tightseal 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。
3
Usage: suitable for airtightseal welding with pressure protection of microwave device, sensor, filter and components that used on spaceflight and guided missile that have high requirement.