Because it is made of a fibreglass composite, it weighs only three-quarters as much as a standard container but—more importantly— when it is empty, it can be folded down to a quarter of its size.
3
这些关键帧,然后在时间线调整,以便在箱子边折叠起来顺序。
These keyframes are then adjusted in the timeline so that the sides of the box fold up sequentially.