| 摘要 |
The handle of the racket has two flat surfaces and each surface has a different hollow in it. The first surface has a hollow which starts 1.5 to 3 cm from its end. The second surface has a hollow, in the middle of the handle, which starts from the end of the handle and reaches as far as its definition. The hollows are both between 0.6 and 3 cm deep, with respect to a standard handle.
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