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Valves in these classes are also available with spiral wound or ring joint gaskets when specified.
如果用户要求，这些压力等级的阀门也可提供螺旋盘绕或环连接垫圈。
youdao
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Valves in these classes are also available with spiral wound or ring joint gaskets when specified.
如果用户要求，这些压力等级的阀门也可提供螺旋盘绕或环连接垫圈。
youdao