The technology of variable frequency speed governing was used in the driving system of the experiment stand. And the advanced stepping digital overflow valve was adopted in the part of loading.

该试验台的驱动系统采用交流变频调速技术，加载部分采用先进的步进式数字溢流阀进行加载。

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Construction on single-family homes continues to remain at a stand-still, as inventories overflow the selling market and unemployment remains over 9%.

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