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        該產品設計獲得了實用新型專利“一種防止反向開啟的雙層安全防護井蓋(專利號:2013207721007)”,在生產過程中還采用了公司的“一種加強型井蓋的鋼骨架(專利號:201420732287.2)”和“一種多層耐壓檢查井蓋(專利號:201420732311.2)”實用新型專利。  


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