While the uppercylinder gives more effect than the lower one that is located symmetry of the measure point.
而对某一固定测点而言，其受上方圆柱的影响要大于受下方圆柱的影响。
2
In a typical setup, an uppercylinder will emit high-frequency sound waves that, when they hit the bottom, concave part of the device, are reflected back.
在一个典型的声悬浮装置中，缸体上部将发出高频声波，声波接触到底部凹面会被反射回来。
3
SI-1 also contains detergents and a synthetic uppercylinder lubricant which will help clean the intake valves, pollution control valves, combustion chamber deposits and carburetors.