Mechanisms for determining a cluster set of mobile devices are disclosed. A duct is disposed inside the camera body and guides the air taken in through the air inlet holes to the air outlet holes. A rapid change in the solubility and volume of the supercritical fluid foaming agent in the thermoplastic polymer results in foaming of the thermoplastic polymer. The health score may be based on a technology malfunction that occurred at the service center. The positional coordinates of the reference points on the surface of the sample piece are then measured using the second device. A ratio between an alloy of Pt\u2014Rh and ZrO2 in the first cermet electrode layer ranges from 20:80 to 50:50 by volume ratio.