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Industries InformationListing Details

ID:20132
Title:Power tong - Patent 7571667
URL:http://www.freepatentsonline.com
Category:Petrochemical Oil & Gas: Power Tongs Swivels
Description:Aug 11, 2009 ... The swivel ring of the swivel coupling is stationary with respect to the power tong housing. It is greatly advantageous for the clamp in the ...
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