Practical evidences prove that the pantograph-catenary relationship and dynamic current-carrying are the key techniques in effecting the increase of train speed.
实践证明：弓网关系及动态受流是当代影响列车提高速度的关键技术问题。
Practical evidences prove that the pantograph-catenary relationship and dynamic current-carrying are the key techniques in effecting the increase of train speed.
实践证明：弓网关系及动态受流是当代影响列车提高速度的关键技术问题。
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