Take note of the characteristics noticed in natural silica (coal) which contained plastic bags with a small sip, grape, honey dishes, made into a table, save the results.
Note the characteristics observed in moisture, natural substances (coal) contained a small plastic bag with zipper, grapes, plates, water spray. What happens to the table record.
Note the various effects observed in the silica gel from natural (coal) packing ถุงพลาสติกมี small zipper, grapes, plate, spray water. Formed into a table record .