| 摘要 |
<P>PROBLEM TO BE SOLVED: To easily and inexpensively perform purification of drinking water, river water, lake and marsh water and the like. <P>SOLUTION: A water purifying agent mainly comprises a powder of silicate clay and is prepared by adding thereto and mixing therewith a powder of a porous substance, a powder of calcined gypsum, and a powder of soluble anhydrous gypsum. <P>COPYRIGHT: (C)2013,JPO&INPIT |
