| 摘要 |
PURPOSE:To expand equivalent mass of the first orifice and further to contract equivalent mass of the second orifice. CONSTITUTION:The first, second and third liquid chambers 8, 9, 10 are provided between inner and outer cylinders 1, 2, and a half cylinder member 11 is connected to an internal peripheral surface of the outer cylinder 2. The first orifice of large equivalent mass is formed in the external peripheral surface and the second orifice 20 of small equivalent mass is formed in the internal peripheral surface, of the half cylinder member 11. The first and second liquid chambers 8, 9 are connected by the first orifice 19, and the first and third liquid chambers 8, 10 are connected by the second orifice 20. |
