| 摘要 |
A tire manufacturing unit having two tire building drums mounted on respective coaxial and independent half shafts butt connected in a rotary manner so as to define a single continuous shaft supported in a rotary manner on a platform mounted for rotation in successive 180 DEG steps about a horizontal axis; each half shaft having a respective independent driving device, and one of the drums moving, during each rotation step of the platform, between a first and second work position, through a cavity formed in the platform supporting base.
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