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嚏函よしか,忽恢ts繁劑溺藍囘苹,釘隻斑溺繁音詆圄

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  • 2. Globe valve manufacturers often use metal materials in the design of the valve, metal materials may appear in the use of corrosion, corrosion will form pitting on the surface of the valve, serious corrosion will appear penetration. Henan globe valve.

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