Underground industrial test showed that the filtering device was reliable and practical with simple structure, and could replace dispersive multi-point one-off filter with filtering core.

井下工业性试验表明，该过滤装置结构简单，可靠实用，可替代分散式多点一次性滤心过滤器。

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"I wouldn't turn off your spam filter, " says Paul Henry, a spokesman for the information technology security firm Secure Computing (nasdaq: SCUR - news - people ).

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While Instagram 2.0 is not a new app, it features a completely different system: new buttons added to the interface of the app allow users to see the filter in effect before snapping, shaving seconds off even the iPhone 4 experience.

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UTC's solution: Pass the return air through an aluminum filter sprayed with titanium dioxide that, hit with ultraviolet rays, sets off a chemical reaction that breaks down nasty organic compounds like benzene and formaldehyde into carbon dioxide and water.

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