| 摘要 |
A customized, anatomically correct insert for a bowling ball includes a main body portion having a first end and a second end. An outer portion has a first end and a second end, the first end being flush with the surface of a bowling ball with which the insert is intended to be used, when in normal use position, and the second end being connected to the first end of the main body portion of the insert. The outer portion of the insert is positioned at the mouth of a bowling ball hole when the insert is in normal use position in the bowling ball hole and has a greatest external dimension substantially equal to the internal dimension of the bowling ball hole, so as to be capable of being press-fit into the bowling ball hole, yet not being so large as to be subject to becoming so tightly stuck within the bowling ball hole that it cannot be selectively removed by the bowler. The main body portion has an outer side wall with a greatest external dimension which is less than the greatest external dimension of the generally outer portion, so that an air space remains between the outer side wall of the central portion and the wall defining the bowling ball hole, and the main body portion and the outer portion have formed therein an anatomically correct cavity for receiving a finger of a bowler for whom the insert is custom-made.
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