| 摘要 |
A bat and a method of making a bat for use in sports, such as baseball. The bat includes a one-piece, hollow bat frame formed by injection molding a durable polymer, such as acrylonitrile butadiene styrene. The bat frame includes a barrel portion, an intermediate portion, and a handle portion, with at least one of the portions having a polygonal cross-section on an interior surface of the bat.
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