The system design variables are magnet external diameter of internal ring, internal diameter of external ring, depth of groove - ring and ampere turns.

系统设计变数为磁铁内环外径、外环内径、槽口深度和安匝数。

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Chewing gum to muscle contraction, adjusting the facial skin, wrinkles gradually reduce the depth of groove formation, or even eliminate some small wrinkles.

咀嚼口香糖能收缩肌肉，调整脸部肌肤，逐渐减少皱纹沟形成的深度，甚至可以消除一些细小的皱纹。

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By varying the groove spacing, the diameter of the single or double diameter hole, and the rear air cavity depth and content, one can obtain absorption over a wide variety of frequencies.

通过改变槽间距，直径的单人或双人直径孔，与后方空气腔的深度和内容，就可以得到吸收超过各种各样的频率。

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