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The aluminum alloy ladder is made of high-strength aluminum alloy profile. After aging oxidation treatment, it has high strength and good toughness. The structure is designed and used flexibly and conveniently. It is the main tool for firefighters to climb to save people and put out fires. In line with GA137-2007 "Fire Stairs" standard, the working length is 14.97m, the minimum ladder width is 365mm, the ladder spacing is 340mm, and the whole ladder quality is 86.5kg. The product provides inspection reports and 3C certification.