The federal US body arbitrating trade disputes has imposed tough new duties on Chinese steel piping imports in a move that will heighten tension between America and its biggest trading partner and emerging geo-political rival.
With $2.8bn in Chinese piping imports in 2008, the case is the biggest against China brought before the International Trade Commission to date.
It follows a string of actions by the US to counter a flood of goods that it claims China exports at below market prices.
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