“鼓动者”的英语？

韦布并非一直是一位外部鼓动者.Mr Webb has not always been an outside agitator.连续混合泥浆在低谷与摆动的型鼓动者.Continuous mixing of slurry in trough with an oscillating type agitator.旋转的鼓动者可灌溉的他.The rotary agitator irrigated him....