This paper analyses the physical constant constructing by dimensional method and introduces the important mean of dimension of quantity in physical constant constructing.
采用量纲的方法分析物理常数的构造，讨论了物理量的量纲在物理常数构造中的重要意义。
Quantity of enclosed strength is due to cast temperature, shaping pressure , hole dimension, physical property of die material, etc.
包紧力的大小与铝液浇注温度、成形压力、孔径尺寸、 模型材料的物理性质等有关。
Quantity of enclosed strength is due to cast temperature, shaping pressure , hole dimension, physical property of die material, etc.
包紧力的大小与铝液浇注温度、成形压力、孔径尺寸、 模型材料的物理性质等有关。
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