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"central vacuum" is a type of vacuum system that is built into a house or building. Instead of using a portable vacuum cleaner, it has a large unit installed in a utility room or basement. The unit is connected to a network of pipes that reach all the rooms in the house. To clean, you only need to connect a hose to the wall socket in each room, and the dirt gets sucked into the central unit. It's a convenient and efficient way to clean without carrying around a heavy vacuum cleaner.
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