The old man bent down and scanned the boy's reposeful face and listened to his placid breathing.

老人弯下身子，审视着孩子平静的脸，听着他平静的呼吸。

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Its running is reposeful. The cutting is accurate, the production efficiency is high. It is assorted equipment of foam foaming machine.

本机采用变频调速控制技术，运行平稳、生产效率高，是自动发泡的必备配套设备。

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Therefore, it is of great importance to study the coupled dynamic characteristics of a mill main drive system for keeping efficient and reposeful production.

因此，研究轧机主传动系统的动力学耦合特性，对于抑制轧机振动、保证高效平稳地生产具有重要的理论意义和实用价值。

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