Answer / welcome4ujd

There are many sites
http://www.spiraxsarco.com/resources/ou-redirect.asp
Go toomega.com and see free litereatures download
transactions all volumes , ur net sholdneed good speed .
http://www.omega.com/literature/transactions/
I think this will be enough

Answer / ramesh

you can through wikipiedia , pacontrol.com

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