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...tp://news.bbc.co.uk/2/hi/uk_news/4564606.stm | work=BBC News | title=Club 'horse' drug to be outlawed | date=28 December 2005 | accessdate=7 May 2010}}</ref ...thetic, although it is the anaesthetic of choice when reliable ventilation equipment is not available. Ketamine tends to increase heart rate and blood pressure

...it to set under water. Similarly, the Romans knew that adding [[Horsehair|horse hair]] made concrete less liable to crack while it hardened, and adding blo ...essential for the production of uniform, high quality concrete. Therefore, equipment and methods should be capable of effectively mixing concrete materials cont