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When making practice welds, pipe shorter than 1 1/2 inches _________.
Great Steel Strike
A major labor strike in 1919 involving steelworkers across the United States, seeking better working conditions, wages, and the right to unionize.
Niagara Movement
An early 20th-century African American civil rights organization founded in 1905, which aimed to fight racial segregation and promote civil liberties and political rights.
Panama Canal
An artificial 50-mile waterway in Panama that connects the Atlantic Ocean with the Pacific Ocean, facilitating international maritime trade.
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