- A sealed room in which exceptional measures are taken to provide a contaminant-free environment. In order to keep dust and other small particles out, there may be seamless plastic walls, external wiring, and a continuous supply of 100% filtered air, among others. Those working in clean rooms must wear special clothing which includes head coverings and special slippers, and before entering, must take a shower of blasted air. temperature and humidity are also strictly controlled. Used for manufacturing and research. Seen, for instance, in a chip fabrication plant.
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