The present invention is directed towards a golf ball which comprises a core, a cover and at least one improved intermediate layer disposed between core and the cover. The present disclosure also discloses a system for synchronizing data between a Qualcomm platform terminal and a PC side. A heat exchange cassette of any one of several disclosed variations is attached to the circulatory flow lines of the catheter, the heat exchange cassette being sized to engage a cavity within one of various described re-usable control units. In addition, the method includes determining a characteristic of polishing within the zone from the combined portion of the output signals. The extension structure is extended from a first sidewall of the first frame to a ring-shaped periphery of the rotating shaft for enhancing a structural strength of the rotating shaft.