Lower the pantograph!

降落受电弓！

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。

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。

The differential equations of motion of the pantograph have been derived.

并推导了受电弓的运动微分方程。

The result is of practical significance in design of pantograph tilting mechanism.

为受电弓倾摆机构的设计开发提供了依据。