friction ball

friction ball [ˈfrikʃən bɔ:l]  [ˈfrɪkʃən bɔl] 

friction ball 基本解释
摩擦球;
friction ball 网络解释

1. 摩擦球,钢种:friction axis ==> 摩擦轴 | friction ball ==> 摩擦球,钢种 | friction band brake ==> 摩擦闸箍

2. 钢种:钢质运输带 steel conveyor belt | 钢种 steel grade; type of steel; ball lump; friction ball; steel ball | 钢珠除灰器 shot cleaner