By Pryamex Inspired by the helmets worn by World War I soldiers, the first hard hat was invented in 1919. In the 1970s, when OSHA was formed, hard hats become…
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By Pryamex Inspired by the helmets worn by World War I soldiers, the first hard hat was invented in 1919. In the 1970s, when OSHA was formed, hard hats become…