名词短语
中文翻译：直接压力密封
同义词：
['direct pressure sealing', 'direct pressure closure']
例句：
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1. The valve is designed to ensure a direct pressure closing action.
阀门设计确保直接压力密封作用。
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2. During the installation process, the direct pressure closing mechanism must be carefully monitored.
安装过程中，必须仔细监控直接压力密封机制。
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3. The manufacturer recommends using a specialized tool for opening and closing the direct pressure closing valve.
制造商推荐使用专用工具打开和关闭直接压力密封阀。