经过我们研究，发现有的耳塞能完全密封住耳槽。
Some of the research we did studied earphones that completely seal up the ear canal.
只能将完全密封的金属容器用于中间轴承。
Only use completely sealed metal containers for intermediate bearing.
在较大的压力和温度范围内，能实现完全密封。
In a larger range of pressure and temperature can be completely sealed.
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