外阀门则在外部(通常在壳体的进水部位)。在下潜时，油从外部气泡传如内部气泡。
To dive, oil is transferred from the external bladder to the internal one.
根据本发明，用于在空气引导通道的第一和第二部分之间提供密封的 所有密封唇形成在外部接头件上并且至少部分地包围内部接头件的外 表面。
All sealed lips provided between the first and second parts of the air guide chunnel forms on the exterior joint member and encloses exterior surface of the inner joint member at least partly.
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