"a room that is virtually free of dust or bacteria; used in laboratory work and in assembly or repair of precision equipment"@en-us . . . "03040376-n"^^ . "102448487"@en-us . "clean room"^^ . . . . "103040376"^^ . "0"^^ . . . . "0"^^ . "clean room"@en-us . "102931297"@en-us . . . "white room"@en-us .