TB/T 1235-1977
Standard series of railway conference telephone equipment (English Version)

Standard No.: TB/T 1235-1977
Language: Chinese, Available in English version
Release Date: 1977
Published By: Professional Standard - Railway
Latest: TB/T 1235-1977

TB/T 1235-1977 history

1977 TB/T 1235-1977 Standard series of railway conference telephone equipment

Standard series of railway conference telephone equipment

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