铸铁法兰对管道活结和配件要求达到最小化，可提供简便的安装和保养。
The cast iron flanges minimize the need of pipe unions and fittings while offering ease of installation and maintenance.
铸铁法兰对管道活结和配件要求达到最小化，可提供简便的安装和保养。
The cast iron flanges minimize the need of pipe unions and fittings while offering ease of installation and maintenance.
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