回转板 meaning in English

finger plate
revolving plate

Swimming pool equipment - additional specific safety requirements and test methods for turning boards
游泳池设备.回转板专门安全要求和试验方法
Racing - small waist width foe quick edge change : smaller radii slalom shorter skis for carve slalom turns . in giant slalom wider radius longer skis
竞技-竞技回转板的腰部很窄，窄小的腰部在滑行时可以灵活的切换板刃。大回转雪板腰部较宽些，板子也长，在高速滑行中更加的稳定。