The feasibility of ETT (Evacuated Tube Transportation)has been verified by foreign and domestic experts.

真空管道运输的可行性已经得到国内外专家的论证。

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Now, this system is called Evacuated Tube Transportation (ETT), which monishes the air resistance of rail transit, but it essentially belongs to the category of rail transit all the same.

真空管道系统就是在现有的轨道交通基础上减小了空气阻力，其本质还是属于轨道交通的范畴。

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