The window cleaning device which was patented in 1903 is the oldest.
雨刷在1903年获得专利，是最古老的汽车配件。
Window cleaning
原声例句
CNN 10 学生英语 2017年11月合集
英语百科
Window cleaner
（重定向自Window cleaning）
Window cleaning, or window washing, is the cleaning of architectural glass used for structural, lighting, or decorative purposes. It can be done manually, using a variety of tools for cleaning and access. Technology is also employed and increasingly, automation.
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