| 摘要 |
The exterior and interior of bellows expansible with the level of fuel in an automotive fuel tank divide the space in the tank above the fuel into a vapor space and a trap space. One end of the bellows is affixed to the roof of the tank and the other end to an insulator that covers substantially the entire surface of the fuel and floats on it. A conduit connects the vapor space to the trap space and has a flow restriction sufficient to retard diffusion between the spaces. Purge means are connected to communicate with the trap space.
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