2 j) U' h+ T7 B' G5 O) L: O帮助文件这个目录下有讲解的: " m" q: K* c2 ?" A, p) RReference Help > Material Flow Objects > Shared Properties of the Material Flow Objects > Attributes of the Material Flow Objects > Attributes for Setting Times of the Material Flow Objects + J& ?" V& o5 b$ M4 o6 F/ b7 p+ ^