single stage trickling filter单级: single stage; single level; ...滴: drip滤池: filter; filter chamber分级滴滤地: stage trickling filter滴滤池: sprinkling filter; trickling filter下载手机词典可随时随地查词查翻译关注微信公众号：chachacidian，回复:单级滴滤池，即可在微信中查询翻译
