提出非完整力学的广义达朗贝尔-拉格朗日原理，包括其牛顿表述和拉格朗日表述。此原理能导出态空间封闭的运动方程组。

Generalized DAlembert-Lagranges principle for non-holonomic mechanics, including its Newtons formulation and Lagrangian formulation, are given. This principle can lead to the closed motion equations.

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潞安示范项目核心浆态床装置于7月7日投料进入试车运行，7月10日生产出合成油品，预计将在7月底进入成品油装置试车。

Feed material was led into the central slurry-bed reactor of lu 'an CTL demonstration unit on July 7th and output on-spec oil on July 10th.

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