名词
中文翻译：Unknown
同义词：
['close operation', 'sealing operation']
例句：
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1. The closure operation is crucial for the safety of the equipment.
闭合操作对于设备的安全至关重要。
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2. During the sealing operation, the workers must follow strict guidelines to prevent any leaks.
在密封操作期间，工人必须遵循严格的指导方针以防止任何泄漏。
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3. The engineers performed a close operation on the damaged pipe to repair it.
工程师对损坏的管道进行了紧密操作以进行修复。