hour-wheel washer

例句：

1. 1. The hour-wheel washer is a device that cleans the gears on an hour-wheel clock.
   小时表清洁器是一种清洁钟面上的小时表装置。
2. 2. The hour-wheel washer is essential for maintaining the accuracy of the clock.
   小时表清洁器对于保持时钟的准确性至关重要。
3. 3. The hour-wheel washer is used to remove dirt and grime from the gears on an hour-wheel clock.
   小时表清洁器用于从钟面上的齿轮上去除污垢和污渍。