| 摘要 |
An oscillating body made of a copper alloy such as a copper-beryllium alloy or a tungsten-copper alloy for mechanical oscillating systems of wristwatches, having several mass weights arranged at regular angle distances around an oscillating body middle axis that respectively can rotate or swivel on the oscillating body on an axis parallel to the oscillating body axis and have a mass center of gravity that is radially offset to their axis. |
