A chain link is designed in the form of a main body portion which is shaped into a loop enclosing an open interior space. The method comprises an aqueous emulsion polymerization of gaseous fluorinated monomers in the presence of an ether selected from the group consisting of dimethyl ether, methyl tertiary butyl ether and mixtures thereof. The intensity of the light lost due to leakage is reduced by about 2 orders of magnitude with an accompanying improvement in the far-field radiation pattern when compared to conventional structures. Once bales are engaged, the apparatus allows for rotating the bales from a position beside the tractor to a position behind the tractor. One or more actual response bubble attributes of the one or more unfilled response bubbles is then calculated. This is achieved by grouping candidate pixels in the 3D spatiotemporal space and generating a 3D bounding box for one caption area.