An engine includes exhaust manifold integrally formed with a cylinder head. The reproducing apparatus reproduces an optical disc in which the contents and the estimated evaluation values are recorded at the outset. The light curable adhesive bonds the strain sensor to the structure surface. The first amount is at least as much as the second amount and no larger than twice the second amount. The mobile communication terminal has a function of having the image taken by the camera unit displayed on at least one of the displays.