用矢量点积求立方体的两条对角线所夹的钝角。
Use the vector dot product to find the obtuse Angle between two diagonals of a cube.
用矢量点积求立方体的两条对角线所夹的钝角。
Use the vector dot product to find the obtuse angle between two diagonals of a cube .
它可用于测试金属的维氏或努氏硬度，通过把测量的对角线值输入到一体化计算器，从而计算出硬度值。
It can be used to test the metal Vicker's or Knoop's hardness, through the diagonal measurement of the value of integration into the calculator, thereby calculate the hardness value.
通过把测量的对角线值输入到一体化计算器，从而计算出硬度值。
Through the diagonal measurement of the value of input to the integration of calculators, in order to estimate the hardness value.
通过把测量的对角线值输入到一体化计算器，从而计算出硬度值。
Through the diagonal measurement of the value of input to the integration of calculators, in order to estimate the hardness value.
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