| style="background: #FF2400" align= center| '''<big>活性污泥</big>'''
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|<center><img srchttpssrc=https://p1.ssl.qhimg.com/t01a6a72356a08a7468.jpg width="300"></center>
<small>[https://baike.so.com/gallery/list?ghid=first&pic_idx=1&eid=1492783&sid=1578538 来自 网络 的图片]</small>
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