Refers to front to back movement of the pantograph on the machine.

指在机器的缩放仪上做前后运动。

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The stability of a special kind of pantograph equation was studied.

研究一类特殊比例方程的稳定性。

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Pantograph and over-head contact line must maintain good contact and reliable by the current.

高速铁路要求受电弓与接触线必须保持良好的接触和可靠的受流。

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Pantograph and over-head contact line must maintain good contact and reliable by the current.

高速铁路要求受电弓与接触线必须保持良好的接触和可靠的受流。

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