1) method of change bottom
换底法
1.
n this paper, advancing a principle of the method of change bottom according to the theorem of Monge solves a problem not having been solved by the method of convention in descrigeometry.
根据蒙若定理理论提出“换底法”原则，解决了几种画法几何常规方法无法解决的问题。
2) change the bottom
换底
1.
The design to change the bottom of ingot mould is made up of two parts (the ingot mould itself and the moving equipments).
阐述了开发新型锭模的必要性和换底锭模的创新设计思路,扼要介绍了换底锭模的生产方法及其使用效果。
4) base conversion
基底变换
5) bottom-clearing replacement
清底置换
6) detachable bottom
可换炉底
补充资料：底法
1.谓确定法式。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条