| 摘要 |
A suction device comprises a first element, a second element, and an intermediate element. The first element comprises a first control volume having a first pressure. The second element comprises a second control volume having a second pressure. The intermediate element is controlled by the first pressure of the first control volume of the first element and the second pressure of the second control volume of the second element. When the first control volume of the first element is varied, the varied first control volume of the first element can substantially have the first pressure under automatic pressure compensation by the second pressure of the second control volume of the second element via the intermediate element.
|
