Standards GB - Chinese national standards - Page 4881

Pure helium,high purity heliun and ultra purity helium

Standard published on 31.10.2025

Test method for unwinding force of pressure sensitive adhesive tapes at low speed

Standard published on 29.5.2002

Measurement of static shear adhesion for adhesive types

Standard published on 8.7.2014

Test method for tack of pressure sensitive adhesive tapes by rolling ball

Standard published on 29.5.2002

Acoustics--Reference zero for the calibration of audiometric equipment--Part1:Reference equivalent threshold sound pressure levels for pure tones and supra-aural earphones

Standard published on 13.5.2004

Acoustics—Reference zero for the calibration of audiometric equipment—Part 3Reference equivalent threshold vibratory force levels for pure tones and bone vibrators

Standard published on 9.3.2022

Acoustics--Reference zero for the calibration of audiometric equipment--Part 4:Reference levels for narrow-band masking noise

Standard published on 8.3.1999

Acoustics - Reference zero for the calibration of audiometric equipment- Part 5: Reference equivalent threshold sound pressure levels for pure tone in the frequency range 8 kHz to 16 kHz

Standard published on 2.7.2008

AcousticsReference zero for the calibration of audiometric equipmentPart 6: Reference hearing threshold levels for test signals of short duration

Standard published on 3.9.2014

Acoustics - Reference zero for the calibration of audiometric equipment - Part 7: Reference threshold of hearing under free-field and diffuse-field listening conditions

Standard published on 2.7.2008