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1. The lower seat connecting arm is designed to provide additional support for the backrest.
下部座椅连接臂的设计是为了为靠背提供额外的支撑。
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2. During the assembly process, it's important to ensure that all components are properly connected and aligned.
在装配过程中，确保所有部件正确连接并对准是很重要的。
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3. The lower seat connecting arm helps to distribute the weight evenly across the entire seat,reducing pressure on the user's back.
下部座椅连接臂有助于将重量均匀分布在整个座椅上，从而减轻用户背部的压力。