The present invention relates to a multi-core optical fiber applicable to an optical transmission line of bi-directional optical communication and a bi-directional optical communication method. At least one distribution device is disposed beneath the thresher rotor and is controllable to deflect grain falling from the thresher rotor assembly in a transverse direction. For each profile parameter having a range of values, an adjustment tool is displayed for selecting a value for the profile parameter within the range of values. The layers are filled with an initial value and a threshold is set. This invention relates to the maize variety X08A113, the seed, the plant produced from the seed, and variants, mutants, and minor modifications of maize variety X08A113. A TiN coating may be used on the stopper feature for anti-stiction.