A conveyor system includes a first conveyor, a second conveyor and a transfer mechanism interposed between the first and second conveyors. The reproduction control information has flag information representing specified still picture data among the plurality of pieces of still picture data. In another embodiment, a well fluid including water, a viscosifying agent, and a salt, the salt including at least one formate salt, wherein the weight-to-volume ratio of the well fluid is within the range of at least 120% to about 400% is disclosed. The server then generates updated base station coordinate values, based on a method of least squares, in which each residual is a difference between the reference and predicted coordinates of each wireless terminal location, for one or more wireless terminals. The eccentric driver is coupled in turn to a driven member.