Starting with Lagrange equations of the first kind, pure differential equations of multibody systems with rheonomic constraints are established.
根
方程与约
方程显含时间的等价性，提出了定常约与定常系统判的等同表述。
Starting with Lagrange equations of the first kind, pure differential equations of multibody systems with rheonomic constraints are established.
根方程与约方程显含时间的等价性，提出了定常约与定常系统判的等同表述。
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