Starting with Lagrange equations of the first kind, pure differential equations of multibody systems with rheonomic constraints are established.
根据变
与约
显含时间的等价
，提出了定常约与定常系统判据的等同表述。
Starting with Lagrange equations of the first kind, pure differential equations of multibody systems with rheonomic constraints are established.
根据变与约显含时间的等价，提出了定常约与定常系统判据的等同表述。
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