Starting with Lagrange equations of the first kind, pure differential equations of multibody systems with rheonomic constraints are established.
根据变换方
方显含时间的等价
，提出了定常定常系统判据的等同表述。
时间有关的Starting with Lagrange equations of the first kind, pure differential equations of multibody systems with rheonomic constraints are established.
根据变换方方显含时间的等价，提出了定常定常系统判据的等同表述。
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