GF 008.6-1994 Technical index system for maintenance of telecommunication network [Volume Six Pamphlet One] Technical indices for maintenance of local telephone line transmission (English Version)
Professional Standard - Post and Telecommunication
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2009-12
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GF 008.6-1994
GF 008.6-1994 history
1970GF 008.6-1994 Technical index system for maintenance of telecommunication network [Volume Six Pamphlet One] Technical indices for maintenance of local telephone line transmission