General principle and basic as well as concrete policies all have their own the boundary of time space, cycle of time space and efficiency of time space.
总政策、基本政策和具体政策都具有自己的时空边界、时空周期和时空效力。
2
In the cycle of detailed boundary entities recognition and detail feature decomposition, an arbitrary solid model which is represented as B-Rep model can be simplified to any level.