| 摘要 |
The cylindrical catchment cage for shellfish has its circular segment catchment structures engaged with each other by buttons in corresponding keyholes. A circular cover constitutes the top and bottom in the cylindrical catchment cage and with a simple hand grip can be firmly rotated against the supporting cylinder. A bait tube is fitted in the center of the catchment cage between the cover top and bottom. The bait tube is provided with a weight in its bottom and a line in its top. |
