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Trade show
A commercial exhibition show or event during which traders or companies can display and market their wares or services to the general public or to the paying attendants of a particular event.
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多氯聯苯 (polychloronated 聯苯）
Energy; General
一組用於製造塑膠的以前作為冷卻劑電力變壓器中的有機物。在環境中，多氯聯苯是對水生生物的毒性極強。他們長時間的堅持與環境，是生物累積的 ...
