Unverified82% confidenceTradeoffTime unknown
双轨道（导轨式）设计推移平稳、不易跑偏适合大面积玻璃，但两器分离难度大、更适合定期擦拭；单轨道结构轻便灵活但边角清洁需反复调整，小窗户够用
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82%
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