Hydraulic vane pump<br />A type of positive displacement pump <br />You will get positive and non positive displacement pump video<br />https://www.youtube.com/edit?o=U&video_id=_RyMYW0agMs&ar=1580304049016<br /><br />You will get hydraulic gear pump video by click on<br />https://www.youtube.com/edit?o=U&video_id=cY_1Zt9SVts&ar=1580304048058
