| 摘要 |
A dental flossing device having a unique and highly effective means for imparting oscillatory (term includes vibratory) motion to the floss only and precisely at such times as such motion is needed. The said means comprises a mechanical clutch which is intermediate the power element and the floss holder (stringer), wherein the clutch is responsive to force applied against the floss to engage the floss holder with the power element to begin oscillation of the floss.
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