Protective material, lining, edge cover and packing tape.
防护材料,衬里,包边及包装带。
We introduced the concept of block directed edge cover diagonal quasi dominant matrix, obtained a new nonsingularity criteria for matrices and distribution theorem on eigenvalues of matrix.
引进了拟块有向边覆盖对角占优矩阵概念,给出了新的矩阵非奇异判定定理和特征值分布定理。
So the point on the edge must rotate much faster to cover that 50 in. in 1.8 seconds than the point near the center, which has to cover less than a fifth of the distance in the same time.
因此,边缘上的点每1.8秒必须比中心的点多转50英寸,使它不得不在同样的时间里覆盖不到五分之一的距离。
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