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laughing gas▼◼◼◼noun[UK: ˈlɑːf.ɪŋ ɡæs] [US: ˈlæf.ɪŋ ˈɡæs]
nitrous oxide [nitrous oxides]▼◼◻◻noun[UK: ˈnaɪ.trəs ˈɒk.saɪd] [US: ˈnɪ.trəs ˈɑːk.ˌsaɪd]
gas and air▼noun
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