A 20-meter-long storage with a 3.5-meter radius can preserve 100 tons of dried rice for 22 months. A small amount of insecticide is needed for the first two days, but none has to be applied thereafter. At the end of the period, no insects can be found in the storage area.
礦研所從六十七年開始在台北市郊的大屯山探勘，發現大量鋁礬土蘊藏，大家都很興奮，正待從事整體性的開發與規劃。