Unfortunately, this air-tight seal 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。
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。
Usage: suitable for air tight seal welding with pressure protection of microwave device, sensor, filter and components that used on spaceflight and guided missile that have high requirement.
用途：适用要求较高的微波器件，传感器，滤波器及航天，导弹上应用的元件气密性带压力保护的封焊。
Reattach cover plate to make an air and water tight seal.
重新固定盖板，并紧密密封防止空气和水通过。
The glass or plastic cups are placed on the skin, and the suction device removes air. This creates a tight seal.
这些玻璃或塑料罐子被放置在皮肤上，然后利用抽吸装置排出空气，这会造成密封。
The soft sealant forms an air tight seal between the base and the cover when the soft sealant is cured.
当该软密封材料被固化时，该软密封材料在该基底和盖之间形成空气密封。
By surrounding a gas-tight, pattented V-Seal with two compressed knitted wire mesh air gap spacers, the connection is made by simply sliding one section of pipe over another.
气密的V形密封器，两个压缩的编织金属网布气隙间隔器，略过管的一部分滑向另一部分。
The commonly used hydraulic seal test and air-tight test for the closed plastic container need to drill a hole on the container body. After test, the container is wasted.
闭口塑料容器一直采用桶身钻孔进行液压和气密试验，浪费较大。
The commonly used hydraulic seal test and air-tight test for the closed plastic container need to drill a hole on the container body. After test, the container is wasted.
闭口塑料容器一直采用桶身钻孔进行液压和气密试验，浪费较大。
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