铅笔长长的,都是硬笔杆,携带起来不太方便。美国一家文具公司的技术人员,看到蛇的动作那么灵活,便制造了一种蛇形铅笔。它可以像蛇一样盘作一团,弯曲成任何曲线形状。用时伸直,不用时弯曲。小巧灵活的蛇形铅笔,用起来多铅笔长长的奋都是硬笔杆,携带起来不太方便。美国一家么方n Long pencil, are hard pen, it is not easy to carry. A technician at a U.S. stationery company, who saw the snake's movements so flexible, created a snake-like pencil. It can be a snake like a plate, bent into any curve shape. When used straight, when not bent. Small and flexible serpentine pencil, pencils with long shot are hard pen shaft, it is not easy to carry. What is the United States?