The invention provides a measuring method of a tread wear amount by using a pneumatic tire in which a mark portion is formed on a part of a tread surface, the mark portion changing its surface shape as wear progresses. In detail, the present invention is to provide a composition of the hot melt adhesive having high adhesion to a polar surface of the polypropylene carbonate resin based hot melt adhesive and adhesion to a non-polar surface. The tool is adapted to be installed within the tight confines of a cylinder head. Once the peer grouping is established, monitoring of pre-determined activities within designated applications is performed to determine the number of occurrence of the predetermined activities over a designated period of time. The control signal and the processed control signal include connection sequence data indicating the cascade connection sequence. The transfer starwheel is mounted on a mounting hub to align the vacuum ports of the transfer starwheel with a selected set of vacuum openings on the mounting hub.