GB/T 38811-2020.Metallic materials-Residual stress-Method of sound beam control.1范围GB/T 38811规定了使用具有一定能量和方向性的声束(固体中的弹性波束)对金...
GB/T 9771.1-2020.Single-mode optical fibres for telecommunication-Part 1 : Characteristics of a dispersion unshifted single-mode optical fibre.1范围GB/T 9771的本部分规定了非...
GB/T 9771.6-2020.Single-mode optical fibres for telecommunication-Part 6: Characteristics of a fibre with non-zero dispersion for wideband optical transport.1范围GB/T 9771的本部分...
GB/T 9771.4-2020.Single-mode optical fibres for telecommunication-Part 4: Characteristics of a dispersion shifted single-mode optical fibre.1范围GB/T 9771的本部分规定了色散...
GB/T 9771.2-2020.Single-mode optical fibres for telecommunication-Part 2: Characteristics of a cut-off wavelength shifted single- mode optical fibre.1范围GB/T 9771的本部分规定...
GB/T 9771.3-2020.Single-mode optical fibres for telecommunication-Part 3: Characteristics of an extended wavelength band dispersion unshifted single-mode optical fibre.1范围GB/T 9...
GB/T 9771.5-2020.Single-mode optical fibres for telecommunication-Part 5: Characteristics of a non-zero dispersion shifted single-mode optical fibre.1范围GB/T 9771的本部分规定...
GB/T 38897-2020.Non-destructive testing-Measurement method for material elastic modulus and Poisson's ratio using ultrasoinc velocity.1范围GB/T 38897规定了基于声速法的材料...
GB/T 38898-2020.Non-destructive testing-Testing method for measuring coating bond strength using ultrasonic wave.1范围GB/T 38898规定了基于超声波原理的涂层结合强度无...
GB/T 38948-2020.Evaluation method for the cracking resistance of asphalt mixture at low temperature.1范围GB/T 38948规定了评价沥青混合料低温抗裂性能的试验设备、...
