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Semiconductors
Any solid material with electrical conductivity due to electron flow (as opposed to ionic conductivity) of a magnitude between that of a conductor and that of an insulator.
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科隆
Personal care products; Perfume
德國首現代香水的前兆次城市生產-歐 - 德科隆 (Kolnisch 瓦塞爾) 近 300 年前。它是主要柑橘油混合的 。流行使是法裡納 Gegenuber 和 4711 是這兩個品牌超過 200 歲 ...