Shape is the outside form of pearls . the shape of ordinary pearls can be calculated by the percentage of diameter distance 形状是指珍珠的外部形状，对普通形状珍珠，本公司以直径差的百分比来计算。
2.
Few studies have been carried out on the enhanced heat transfer mechanism of 3 - d ift due to the complex and irregual external shape 但由于三维扩展表面复杂和不规则的外部形状，目前对其强化传热机理的分析和研究还很少。
3.
Mechanical standardization of semiconductor devices - part 4 : coding system and classification into forms of package outlines for semiconductor device packages 半导体装置的机械标准化.第4部分:半导体装置封装外部形状的分类和编码系统
