What was formerly the biggest industry in Bethlehem, Pennsylvania?
Steel Steel workers Steel plate Steel truss Steelworker Steel (alloy) Steel industry Steel (metal) Steels Titanic steel Steelworkers Steel in Africa Steel sheeting Crude steel Steel worker Unwrapped steel Long steel products Steel Construction Steel manufacture
steel plate titanic steel steel sheeting steel metal steel truss steel construction steelworker steel alloy steel steels steel in africa steel worker crude steel steel workers steelworkers steel industry unwrapped steel long steel products steel manufacture
steel
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Steel