Both characteristic quantity of safety grade and its variable are the value obtained from the fuzzy sub-set of safety grade on domain, and are not a definite point.
安全等级特征量及安全等级变量，均为安全等级取值论域上的模糊子集，而并非是一个确定的点。
This paper discusses the problems of doing work by the forces pointing at the definite point or vertically at the definite line or plane. And a calculating formula is given.
本文讨论了指向定点及垂直指向定直线或定平面的力的作功问题，并给出了一个统一的计算公式。
This paper discusses the problems of doing work by the forces pointing at the definite point or vertically at the definite line or plane. And a calculating formula is given.
本文讨论了指向定点及垂直指向定直线或定平面的力的作功问题，并给出了一个统一的计算公式。
应用推荐