| 摘要 |
<p>A porous grog with a body composition of water, clay and combustible material. Further, an earthenware water purification filter (5) utilizing the porous grog in the body composition of the filter. A water purification system (70) incorporating the filter, the water purification system capable of removing about 99% of all particles not less than 1.0 micron is size.</p> |
