Maintenance/update-free: traditional wooden or metal barrier will cost time and energy to repair and maintaining, will bring so much trouble to users.

 
  • 免維護更新:傳統的木制和金屬柵欄,需要經(jīng)?;ㄙM時(shí)間與精力來(lái)修理和維護,給用戶(hù)帶來(lái)諸多不便。
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