Dimensionless quantities in physics are those that require no unit .
物理学中无量纲的量就是不需要单位的量。
In non linear packaging system, the system parameter and dimensionless dropping shock velocity are the evaluation quantities.
对于非线性包装系统，系统参数和无量纲跌落冲击速度是产品跌落破损的评价量。
In non linear packaging system, the system parameter and dimensionless dropping shock velocity are the evaluation quantities.
对于非线性包装系统，系统参数和无量纲跌落冲击速度是产品跌落破损的评价量。
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