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GB/T 3789.7-1991 Measurements of the electrical properties of transmitting tubes-Measuring methods of anode ion current 30 (USD) via email in 1-3 business day ABOLISHED
GB/T 3789.25-1991 Measurements of the electrical properties of transmitting tubes-Methods of measuring the vision output power 90 (USD) via email in 1-3 business day ABOLISHED
SJ/T 11082-2000 Measuring methods of the heater or filament current and voltage for electronic tubes 60 (USD) via email in 1 business day VALID
GB 3189-1982 Connecting dimensions for caps of electronic tubes 60 (USD) via email in 1-3 business day ABOLISHED
GB/T 3789.6-1991 Measurements of the electrical properties of transmitting tubes-Measuring methods of transconductance and amplification factor 60 (USD) via email in 1-3 business day ABOLISHED
GB/T 12855-1991 Application and care for small power transmitting tubes via email in 1-3 business day VALID please email coc@codeofchina.com for quotation
GB/T 3789.27-1991 Measurements of the electrical properties of transmitting tubes-Methods of measuring the inter modulation distortion of a three tone signal 45 (USD) via email in 1-3 business day ABOLISHED
GB 11287-1989 Vibration(sinusoidal) tests on relays and protection equipment via email in ABOLISHED please email coc@codeofchina.com for quotation
GB/T 3789.29-1991 Measurements of the electrical properties of transmitting tubes-Method of measuring the non-linearity in the luminance of the lower frequency 60 (USD) via email in 1-3 business day ABOLISHED
GB 4965-1985 Classification and designation for getter 75 (USD) via email in 1-3 business day VALID
GB/T 4183-2002 Molybdenum-tungsten alloy wire via email in 1-3 business day VALID please email coc@codeofchina.com for quotation
GB/T 3789.21-1991 Measurements of the electrical properties of transmitting tubes-Measuring methods of static characteristic reference point 30 (USD) via email in 1-3 business day ABOLISHED
GB/T 3789.13-1991 Measurements of the electrical properties of transmitting tubes-Measuring methods of static characteristic curve for common grid circuit 45 (USD) via email in 1-3 business day ABOLISHED
GB 11028-1989 Test method for the evaluation of bond strength of impregnating varnishes by the wire bundle test via email in ABOLISHED please email coc@codeofchina.com for quotation
GB/T 3789.22-1991 Measurements of the electrical properties of transmitting tubes-Measuring methods of vibration stability 30 (USD) via email in 1-3 business day ABOLISHED
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