GB/T 14185-1993 General specification for language learning systems

GB/T 191-2000 Packaging—Pictorial marking for handling of goods GB/T 191-2008 Packaging—Pictorial marking for handling of goods GB/T 191-2025 Graphical symbols marking for handling and storage of packages GB/T 2018-1987 Methods of measuring the characteristics of recording and reproducing equipment for sound on magnetic tape GB/T 2018-2011 Methods of measuring the characteristics of recording and reproducing equipment for sound on magnetic tape GB/T 2423.1-2001 Environmental testing for electric and electronic products—Part 2:—Test methods Tests A:Cold GB/T 2423.1-2008 Environmental testing for electric and electronic products—Part 2:Test methods—Tests A:Cold GB/T 2423.2-2001 Environmental testing for electric and electronic products—Part 2:Test methods-Tests B:Dry heat GB/T 2423.2-2008 Environmental testing for electric and electronic products—Part 2:Test methods—Tests B:Dry heat GB/T 2423.3-1993 Basic environmental testing procedures for electric and electronic products—Test Ca:Damp heat, steady state GB/T 2423.3-2006 Environmental testing for electric and electronic products—Part 2:Testing method—Test Cab:Damp heat, steady state GB/T 2423.3-2016 Environmental testing—Part 2:Testing method—Test Cab:Damp heat,steady state GB/T 2423.4-1993 Basic environmental testing procedures for electric and electronic products—Test Db:Damp heat, cyclic GB/T 2423.4-2008 Environmental testing for electric and electronic products—Part 2:Test method—Test Db:Damp heat,cyclic(12 h+12 h cycle) GB/T 2423.5-1995 Environmental testing for electric and electronic products—Part 2:Test methods—Test Ea and guidance:Shock GB/T 2423.5-2019 Environmental testing—Part 2:Test methods—Test Ea and guidance:Shock GB/T 2423.6-1995 Environmental testing for electric and electronic products—Part 2:Test methods—Test Eb and guidance:Bump GB/T 2423.7-1995 Environmental testing for electric and electronic products Part 2:Test Ec and quidance:Drop and topple (Primarily for equipment-type specimens) GB/T 2423.7-2018 Environmental testing—Part 2:Test methods—Test Ec:Rough handling shocks,primarily for equipment-type specimens GB/T 2423.8-1995 Environmental testing for electric and electronic products—Parts 2:Test methods—Test Ed:Free fall GB/T 2423.9-2001 Environmental testing for electric and electronic products—Part 2:Test methods—Test Cb:Damp heat, steady state, primarily for equipment GB/T 2423.10-1995 Environmental testing for electric and electronic products—Part 2:Test methods—Test Fc and guidance:Vibration (Sinusoidal) GB/T 2423.10-2008 Environmental testing for electric and electronic products—Part 2:Tests methods Test Fc:Vibration(sinusoidal) GB/T 2423.10-2019 Environmental testing—Part 2:Tests methods—Test Fc:Vibration(sinusoidal) GB/T 2423.11-1997 Environmental testing for electric and electronic products Part 2:Test methods Test Fd:Random vibration wide band—General requirements GB/T 2423.12-1997 Environmental testing for electric and electronic products Part 2:Test methods Test Fda:Random vibration wide band—Reproducibility high GB/T 2423.14-1997 Environmental testing for electric and electronic products Part 2:Test methods Test Fdc:Random vibration wide band—Reproducibility low GB/T 2423.15-1995 Environmental testing for electric and electronic products—Part 2:Test methods—Test Ga and guidance:Acceleration, steady state GB/T 2423.15-2008 Environmental testing for electric and electronic products—Part 2:Tests methods—Test Ga and guidance: Acceleration,steady GB/T 2423.16-1999 Environmental testing for electric and electronic products—Part 2:Tests methods—Test J and guidance:Mould growth GB/T 2423.16-2008 Environmental testing for electric and electronic products—Part 2:Test methods—Test J and guidance:Mold growth GB/T 2423.16-2022 Environmental testing—Part 2:Test methods—Test J and guidance:Mould growth GB/T 2423.17-1993 Basic environmental testing procedures for electric and electronic products Test Ka:Salt mist GB/T 2423.17-2008 Environmental testing for electric and electronic products—Part 2:Test methods—Test Ka:Salt mist GB/T 2423.17-2024 Environmental testing—Part 2:Test methods—Test Ka:Salt mist GB/T 2423.18-2000 Environmental testing—Part 2:Tests—Test Kb:Salt mist, cyclic (sodium chloride solution) GB/T 2423.18-2012 Environmental testing—Part 2:Test methods—Test Kb:Salt mist,cyclic(sodium chloride solution) GB/T 2423.18-2021 Environmental testing—Part 2:Test methods—Test Kb:Salt mist,cyclic(sodium chloride solution) GB/T 2423.19-2013 Environmental testing—Part 2:Test methods—Test Kc:Sulphur dioxide test for contacts and connections GB/T 2423.20-2014 Environmental testing—Part 2:Test methods—Test Kd:Hydrogen sulphide test for contacts and connections GB/T 2423.21-1991 Basic environmental testing procedures for electric and electronic products—Test M:Low air pressure GB/T 2423.21-2008 Environmental testing for electric and electronic products—Part 2:Test methods—Test M:Low air pressure GB/T 2423.21-2025 Environmental testing—Part 2:Test methods—Test M:Low air pressure GB/T 2423.22-2002 Environmental testing for electric and electronic products—Part 2:Test methods Test N:Change of temperature GB/T 2423.22-2012 Environmental testing—Part 2:Test methods—Test N:Change of temperature GB/T 2423.23-1995 Environmental testing for electric and electronic products Test Q:Sealing GB/T 2423.23-2013 Environmental testing—Part 2:Test methods—Test Q:Sealing GB/T 2423.24-1995 Environmental testing for electric and electronic products Part 2:Test methods Test Sa:Simulated solar radiation at ground level GB/T 2423.24-2013 Enviromental testing—Part 2:Test methods—Test Sa:Simulated solar radiation at ground level and guidance for solar radiation testing GB/T 2423.24-2022 Environmental testing—Part 2:Test methods—Test S:Simulated solar radiation at ground level and guidance for solar radiation testing and weathering

IEC 574-17-89