| 摘要 |
<p>A looped racket frame has two frame portions which are symmetrically opposite with respect to the longitudinal axis of the frame to hold some transverse string lines passing through a central area of the string web. These opposite frame portions are provided with two elongated indentations at the inner peripheries thereof to enlarge the distance between the string holes which hold the transverse string lines, thereby lengthening the string lines passing through the central area.</p> |
