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GB/T 3654.9-1983
Methods for chemical analysisof ferroniobium--The thiocyanate photometric method for the determination of tungsten content
GB/T 4890-1985
Statistical interpretation of data--Power of tests relating to means and variances of normal distributions
GB/T 5594.5-1985
Test methods for properties of structure ceramic used in electronic components--Test method forvolume resistivity
GB/T 5209-1985
Paints and varnishes--Determination of resistance to water--Water immersion method
GB/T 5279.2-1997
Countersunk flat head screws--Part 2:Penetration depth of cross recesses





