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Astronomy
The scientific study of planets, stars, black holes, comets and other celestial bodies that make up outer space.
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醫療空氣
Fire safety; Prevention & protection
此標準的醫療空氣的目的,是提供從空氣筒、 大容量的容器,醫用空氣壓縮機,或已經重組從氧 USP、 無油、 乾燥氮 NF。