Much research dealt with the problem in the pulsation of hydraulic pumps. studies. research and literature for vibration did not interfere with the effect of the medium which make vibrations and effect of temperature on the medium (the indirect effect on mechanical vibration). In this research a practical correlation between pulsation of pumps and temperature. https://www.bekindtopets.com/hot-sale-Oreiller-de-voiture-ISIDOR-Chantilly-top-super/