A communication system and method for using a communication system is provided. The rotation axle of the outer lock part is provided thereon with the cam-styled axle sleeve; the rotation axle of the inner lock part is further connected with a second rotation axle. Methods provided include producing a soybean plant by crossing soybean variety XB73B13 with another soybean plant, methods for introgressing a transgenic trait, a mutant trait, andor a native trait into soybean variety XB73B13, methods for producing other soybean varieties or plant parts derived from soybean variety XB73B13, and methods of characterizing soybean variety XB73B13. Accordingly, the microwave oven and the method may selectively set various functions of the microwave oven to a predetermined number of function buttons, allowing execution of desired functions rapidly and easily. The method further comprises adjusting the LP EGR and uncooled HP EGR rates within second limits, different from the first, to maintain the target dilution level in the intake manifold during transient conditions.