为建立合理的飞机飞控系统液压作动器的虚拟样机，必须对其关键部件密封圈的受力状况进行计算分析。
In order to establish a reasonable virtual prototype for the hydraulic actuators ot aircraft Ihght control system, the stress state of the key components, the sealing ring must be calculated.
在海底进行电磁场探测必须解决仪器的承压密封问题。
The problem of pressure bearing and seal of the instrument should be solved before the seafloor magnetotelluric prospecting is carried on.
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