滚子

Apply the wallpaper paste with a roller.

用来涂墙纸的糨糊。

Using biserial roller axletree with centripetal spherical support of the host axletree can reduce energy consumption by 30%.

主承受用双列向心还球面承，可降低能耗30%。

In general,the cylindrical roller bearings, belonging to axial discerptible bearing,are suitable only for sustaining radial loads.The contact of roller with race is linear.

圆柱承一般只用于承受向负荷，与套圈道为线性接触，属向可承。