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The wave packet does not include the numbers on both sides.
Wave number includes the previous number, not the latter number. As explained on the fourth page of compulsory mathematics in senior high school, the 0-degree wavy line is 360 degrees, which means that it is greater than or equal to 0 degrees and less than 360 degrees, so the wavy line includes the front numbers, but does not include the back numbers. Mathematically, it is a mathematical symbol representing equivalence relation, which means equivalent infinitesimal.