| 摘要 |
<p>A hollow clay pottery container (10) having an opening (14) characterised in that the hollow clay pottery container (10) has an outer wall (12), contains a quantity of active fluid (22), the opening is sealed, the clay pottery of the container has been fired at a temperature below the vitrification point of the clay so that the clay pottery is permeable to vapour emitted from the active fluid (22) and the container (10) is arranged so that the vapour can permeate through the outer wall (12) thereof. </p> |
