| 摘要 |
A vacuum venture apparatus includes a plug with a first opening, a second opening and a third opening. The first opening is located in the plug so as to receive fluid from a source of fluid and the first opening has a single uniform diameter. The second opening in the plug is connected to the first opening and the second opening has a first diameter and a second diameter and the first diameter is larger than the second diameter and the second diameter is the same as the single uniform diameter of the first opening. Further, the second opening second diameter is connected to the first opening. The third opening is located in the plug and is open to the atmosphere. The third opening has a first diameter and a second diameter and the first diameter is larger than the second diameter and the second diameter is smaller than the single uniform diameter of the first opening, Further, the third opening second diameter is connected to the first opening. Further, the third opening may or may not have an attachment for the purpose of directing a vacuum line to a reservoir.
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