An injection molding apparatus includes a melt furnace and a metal supply system located in the melt furnace. The pollution control system includes a pre-filter, a cooling device and a fiber bed filter. The upper end of a roller structure rotatably supports a spherical roller, while its lower end mounts to the base frame so that at least a portion of the spherical roller extends through the opening of the user support member. If the difference is less than or equal to a threshold difference, an output color value inclusively between the highest color value and the lowest color value may be selected, and a first representation of the output color value may be written to an output medium. For example, mobile terminals may detect a signal-to-interference ratio every time slot and use that quality measurement for purposes of selecting a maximum transmission rate for the next time slot. , United States and has been asexually reproduced and assessed in field plots in Prosser, Wash.