| 摘要 |
PROBLEM TO BE SOLVED: To prevent a chair in a bathtub from floating underwater with the buoyancy. SOLUTION: The sinking of the chair is prevented by bars bridged across the upper end part of the bathtub. The bars are fixed at the upper end part of the bathtub by a floating preventive device, so that the legless chair will not float in the bathtub filled with water. |
