首页>
外国专利>
APPARATUS FOR FILTERING FLUID PARTICULARLY WATER BY FORCE OF GRAVITY IN COUNTER FLOW THROUGH GRANULAR FILTER BED, METHOD FOR OPERATING THE APPARATUS AS WELL AS FOR FORMING THE FILTER BED
APPARATUS FOR FILTERING FLUID PARTICULARLY WATER BY FORCE OF GRAVITY IN COUNTER FLOW THROUGH GRANULAR FILTER BED, METHOD FOR OPERATING THE APPARATUS AS WELL AS FOR FORMING THE FILTER BED
