A foreign substance inspection apparatus 1 which obtains images of a powder material with a two-dimensional camera 17 and subjects the image data outputted from the camera 17 to image processing, whereby foreign substances mixed into the powder material are detected. In all procedures, a hydrophobicity distribution of a protein is shifted and normalized. The other master brake cylinder chamber is allocated to the two other wheel brakes of the other vehicle axle, so that given bubble-free pressure medium downstream from the pump, the wheel brakes of both vehicle axles make a contribution to vehicle deceleration.