名词短语
中文翻译：密封端
同义词：
['sealing end', 'welding head']
例句：
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1. The engineer used a special tool toseal the end of the pipe.
工程师使用一种特殊工具来密封管道的末端。
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2.The welder was working on themetal parts with great precision.
焊工正在用极高的精度焊接金属部件。
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3. The pothead had a habit of smoking in publicplaces.
这个烟鬼有在公共场所吸烟的习惯。