斜面和台阶上的各控制件布局合理且形状各异，方便儿童操作，手感舒适。

All the control units on the inclined face and the convex step are reasonable in allocation and variable in shape, which provides easy operation and comfortable hand feeling to children.

youdao

斜面和台阶上的各控制件布局合理且形状各异，方便儿童操作，手感舒适。

All the control units on the inclined face and the convex step are reasonable in allocation and variable in shape, which provides easy operation and comfortable hand feeling to children.

youdao