Hard rubber and fur are commonly used in demonstrations. 在演示中，常用硬橡胶棒和毛皮。
Puppies need to experience many different sensations and textures in their mouths so rope toys and hard rubber toys are usually a hit. 小狗需要对不同的东西进行感受，所以一些绳索类和硬橡胶类的玩具会对小狗造成伤害。
A hard rubber disk used in ice hockey as the playing and scoringmedium. 冰球冰球比赛中用于击打和得分的硬橡皮盘状物。
