By installing MCB on the front and rear of a vehicle, it gently regulates the sudden repulsive force that occurs when the body tries to return to its original shape after deformation when going over bumps while driving. At the same time, it also suppresses minute vibrations of the body (= continuous minute deformations of the body), thereby mitigating unpleasant jolting and roughness, improving ride comfort and reducing noise, thereby achieving a higher level of handling stability.