• 具有较高的密封性能广泛用于城市给排水管路是各种水分配系统消防系统重要部件

    With good sealing performance and as an important part in water-distribution and fire protection system, this type of valve has widely been used in city's water-supply system and sewerage.

    youdao

  • 具有较高的密封性能广泛用于城市给排水管路是各种水分配系统消防系统重要部件

    With good sealing performance and as an important part in water-distribution and fire protection system, this type of valve has widely been used in city's water-supply system and sewerage.

    youdao

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