A piezoelectric-balance type PM-10 monitor used for measuring the inhalable dust concentration indoor has been developed.

本课题研制了一种应用压电天平原理，用于室内公共场所监测用的PM-10粉尘测定仪。

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From 6 pm to 10 pm every Friday, the Regent's Park enclosure opens its gates to those over 18 years of age for some after-dark entertainment.

BBC: London��s wild night out

In contrast to The Roxy Live, Plasma (open Wednesday through Saturday, from 9 pm on Wednesdays, 10 pm on Thursdays and Fridays and 11 pm on Saturdays) is a small and intimate club located in the neighbourhood of Barracas a few blocks from the more well-known San Telmo district.

BBC: Rock around the clock in Buenos Aires

The demonstration, which was authorized for 100, 000 people, is expected to last until 2.30 pm (10:30 GMT).

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