• At present the use of the butterfly valves for more than soft sealed off valve, characterized by simple structure, light weight, easy maintenance, construction costs low;

    目前使用蝶阀密封蝶阀其特点是结构简单、重量维修方便成本造价低;

    youdao

  • At present the use of the butterfly valves for more than soft sealed off valve, characterized by simple structure, light weight, easy maintenance, construction costs low;

    目前使用蝶阀密封蝶阀其特点是结构简单、重量维修方便成本造价低;

    youdao

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