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1955年美国林业研究所展出一种供建筑用的纤维板,定名为“扩散板”(Diffusion Board),此种板料是经过特殊化合物的处理,可以过滤毒气,和载有病害的微尘,以及原子爆炸后空气中的放射性物质,但是同时能让氧气通过,并且可以同样的使建筑物内人所呼出的二氧化碳放出。任何一种木材的纤维皆可供作原料。根据小型生产试验说明可用一般纤维板的设备来制作此种板材。
In 1955, the American Institute of Forestry exhibited a fibreboard for construction called “Diffusion Board,” a sheet that has been treated with a special compound to filter gas and contain microscopic Dust, and radioactive substances in the air after the atomic bombing, but at the same time allows oxygen to pass through and, in the same way, emits the carbon dioxide exhaled by people in the building. Any kind of wood fiber can be used as raw materials. According to the small production test instructions can be used to produce the general equipment of fibreboard.