Pot lid putting

摘要

Topic Containment the pot lid which has been used for the pot of adding zeal safely and cleanly, the pot lid putting whose at the same time structure is simple is offered. SolutionsTwo semi- elliptic sections it consists of 2 these standards which concatenate the said semi- elliptic section vertically, the opening of the said semi- elliptic section makes identical direction. Choice figure Drawing 1