双轴心导轨:金属或其它材料制成的槽或脊，可承受、固定、引导移动装置或设备并减少其摩擦的一种装置。导轨表面上的纵向槽或脊，用于导引、固定机器部件、专用设备、仪器等。导轨又称滑轨、线性导轨、线性滑轨，用于直线往复运动场合，拥有比直线轴承更高的额定负载， 同时可以承担一定的扭矩，可在高负载的情况下实现高精度的直线运动。
Double axis guide: a groove or ridge made of metal or other materials, which can bear, fix, guide and reduce friction of mobile devices or equipment. Longitudinal groove or ridge on the surface of guide rail, used to guide and fix machine parts, special equipment, instruments, etc. The guide rail, also known as slide rail, linear guide rail and linear slide rail, is used in the situation of linear reciprocating motion. It has a higher rated load than the linear bearing, and can bear a certain torque at the same time. It can realize high-precision linear motion under the condition of high load