13. Traffic Signal Poles, Coffee Filters, Chainsaw Mining Machines
Aired Jul 2, 201521 minTMDb
Metal tubes and structural sections are formed, welded, protected against corrosion and prepared to support traffic signals. Porous paper is formed, cut, pleated or crimped into disposable coffee filters, while heavy steel frames, drive systems and chains fitted with cutting teeth are assembled into machines that cut through rock and mineral deposits.
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