In this paper, the concepts of star element and star ideals of a semi-ring are introduced.
本文引入了半环的星元素、星理想、星同余等概念，得到了半环的星同余的一些重要性质。
2
Handle shape usually semi-ring and it usually made of pure porcelain, glaze, glass, stainless steel or plastic.
把手形状通常为半环。通常材质为纯瓷，釉瓷，玻璃，不锈钢或塑料。
3
Design calculation of dual semi-ring (DSR) high pressure vessel is introduced in this paper. It USES the method of stress analysis based on the theory of shells.