| 摘要 |
<p>The present invention relates to a buoyancy-controlling fishing sinker. More specifically, the present invention comprises: a hollow column-shaped top cap; a supporting rod which is a rod-shaped member where the top cap is installed on one end; a column shaped body; a second through hole penetrating an upper and bottom side of the body; a coupling groove where a ring-shaped groove is provided on an outer surface of the body; and a coupling member combined to a bottom surface of the body.</p> |
