JJG(邮电) 032-1995
Verification rules for dual-tone multi-frequency telephone tester (English Version)
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JJG(邮电) 032-1995
Standard No.
JJG(邮电) 032-1995
Language
Chinese,
Available in English version
Release Date
1995
Published By
National Metrological Verification Regulations of the People's Republic of China
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