A method and apparatus for cleaning a web-based chemical-mechanical planarization system. In an illustrative embodiment, a write data signal is received as input to a processing component. The hypervisor stores the one or more data packets in a buffer. Each bridge part includes a transmission portion and a periphery portion. An entry type which is a subtype of another inherits all fields and behavior of its super-type, and contains additional fields andor defines newmodified behavior. The reversible seat is mountable via an attachment point on the stroller frame in either a forward or rearward orientation with respect to the stroller frame, and in such a way that the attachment point can be moved relative to the stroller frame for collapse of the reversible seat along with the stroller frame, irrespective of the reversible seat’s orientation.