| 摘要 |
A chamber having an internal volume, end surfaces and a side wall. The chamber is adapted to change its volume by leakage-free displacement of the end surface. The side wall has at least three adjacent sleeves (1-6), and an elastic seal (8-14) is arranged between each of the sleeves, such that the seals are pressurized and expanded when the sleeves are moved due to a displacement of the end surfaces. |
