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Electronic vacuum devices

comprising gas-filled, vacuum, cathode-ray, X-ray tubes and other vacuum devices

Pronunciation
/əˌlɛkˈtrɑnɪk ˈvækˌjuəm dɪˈvaɪsəz/
/ɪlɛkˈtrɒnɪk ˈvakjuːm dɪˈvʌɪsɪz/