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quartern n.1.夸脫侖〔液量單位 (=1/4 pint, gil...

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The titania photocatalysts have been research quartern century . it has characteristic of photocatalysis which is excellent performance of environmetal cleanup 二氧化鈦光觸媒已發展了25年,它具有光催化的特性,是一非常出色的環境清凈的光觸媒。