单词:secondary trickling filter
单词:secondary trickling filter 相关文章
But the HEPA filter for Olivers Vibe got dirty very quickly. And, it was not cleanableit was simply replaceable. When it turned filthy brown, Oliver went back to Target to buy a new filter. Oddly, Target sold the F15 belt for the Vibe, but not the fi
From VOA Learning English, this is the Health Lifestyle report. In parts of India, it is not uncommon to see people wearing a mask over their nose and mouth. The capital, New Delhi, has some of the world's dirtiest air. The pollution was a call for a
1. A Pakistani-born Virginia man arrested on terrorism charges says he cannot afford an attorney. Farooque Ahmed did not enter a plea and has been ordered held without bond. The FBI says Ahmed cased Washington DC area subway stations in what he thoug
Details about Samsung's next big smartwatch have been trickling out for weeks. But now a new report gives us the most detailed look yet Samsung's next wearable. 关于三星下一代智能手表的细节已流传数周。但现下有一份新报告向我
By Tabinda Naeem Washington, D.C. 21 May 2007 Two years ago, the National Academy of Engineering established the Grainger Challenge Prize for Sustainability. This $1 million award was designed to challenge the world's scientists to develop a practica
HBO's Popular TV series Game of Thrones has given Northern Ireland's economy an unexpected tourism boast. Local officials say filming of the series in Northern Ireland has led to a 110-million pounds investment in the economy. Season six is currently