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GB/T 12229-2005 碳素钢铸件技术条件 [正版]GB/T 12229-2005 通用阀门碳素钢铸件技术条件

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GB/T 12226-2005 灰铸铁件技术条件 [正版]GB/T 12229-2005 通用阀门碳素钢铸件技术条件

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GB/T 12230-2023 不锈钢铸件技术条件 [正版]GB/T 12229-2005 通用阀门碳素钢铸件技术条件

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[8本套]通用阀门技术条件 [正版]GB/T 12229-2005 通用阀门碳素钢铸件技术条件

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GB/T 12227-2005 球墨铸铁件技术条件 [正版]GB/T 12229-2005 通用阀门碳素钢铸件技术条件

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GB/T 12232-2005 法兰连接铁制闸阀 [正版]GB/T 12229-2005 通用阀门碳素钢铸件技术条件

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GB/T 12225-2018 铜合金铸件技术条件 [正版]GB/T 12229-2005 通用阀门碳素钢铸件技术条件

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GB/T 12228-2006 碳素钢锻件技术条件 [正版]GB/T 12229-2005 通用阀门碳素钢铸件技术条件

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GB/T 12233-2006 铁制截止阀与升降式止回阀 [正版]GB/T 12229-2005 通用阀门碳素钢铸件技

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允诚铸钢截止阀 DN20 PN25 个

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