ellipsoidal heads meaning in Chinese

椭圆封头
椭圆形封头

Leakage of high pressure ammonia preheater pipe and ellipsoidal head in the joint production of melamine with urea is introduced , hazard and reasons of leakage are analyzed to put forward the methods for prevention of similar accidents
摘要介绍了三聚氰胺尾气联产尿素装置的高压氨预热器列管及封头发生泄漏的情况，分析了泄漏产生的危害及原因，提出了防止类似事故发生的方法。
Abstract : based on the basic concept of the revolving shell , the equation of the middle surface generatrix of the approximate ellipsoid portion of the ellipsoidal head is derived , the unwrapped area and the unwrapped diameter of the ellipsoidal head are calculated , the result is compared with that of derived from the real ellipsoid and that of calculated from the empirical equation , relative chart and code are given out , which could be used by manufactures for reference
文摘:根据回转壳体的基本概念，推导了椭圆封头的近似椭圆壳部分的中面母线方程，据此推导计算了椭圆封头的展开面积及展开圆直径，并根据椭圆壳几何形状推导的结果与经验公式所得结果进行了比较，给出了有关图表及计算程序，可供制造单位参考使用。