| 摘要 |
A liquid dispensing nozzle has a spout formed of inner and outer concentric cylindrical tubes. Liquid is dispensed from the nozzle through the inner tube to a tank to be filled. Vapors within the tank are returned through an annular passage, which is between the inner and outer tubes, to vapor recovery means by a vacuum pump. The vacuum pump exerts a sufficient suction to pull not only the vapors within the tank but also some air from the atmosphere through the fill pipe in which the spout is inserted so as to insure that no vapor escapes to the atmosphere.
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