• Cast iron manhole cover anti impact resistance, easy rupture.

    铸铁检查井盖冲击破裂

    youdao

  • Cast iron manhole cover of good quality is to see its toughness and hardness.

    质量好的铸铁井盖韧度硬度的。

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  • The main cast iron manhole cover is being applied in the sewers of the city, but the cause of quality problems in what factors?

    铸铁井盖主要应用城市下水道造成质量问题因素在哪些

    youdao

  • The main cast iron manhole cover is being applied in the sewers of the city, but the cause of quality problems in what factors?

    铸铁井盖主要应用城市下水道造成质量问题因素在哪些

    youdao

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