量管家0-25mm公法线数显千分尺 特点* 盘型测头可以插入缝隙测量，可测量齿根切线方向长度；*内置无线传输； * 硬质合金测量面，烤漆尺架；* 测量时测杆不旋转；Feature：* Disc measuring face can measure small slot,it can also measure the length of gear toothtangent;* Painted frame.* Non-rotation of spindle when spindle moving* Built in Wireless transmission(optional)