名词
中文翻译：Unknown
同义词：
['contact face', 'engaging surface', 'engaging edge']
例句：
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1. The engineer carefullyinspected the engaging side of the gears to ensure they were functioning correctly.
工程师仔细检查了齿轮的啮合面，确保它们正常工作。
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2. During the assembly process, it is important to engage the correct side of the gears to avoid misalignment.
在装配过程中，重要的是要正确连接齿轮的啮合面，以避免错位。
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3. The technician had to engage the engaging side of the gears to remove the stuck bolt.
技师必须正确连接齿轮的啮合面来拔出卡住的螺栓。