~(87)Rb atomic frequency standard

1000 kV series voltage standard

1394 IEEE standard

2008 Standard

24 F standard sheath

3 standard deviation criterion

3-A sanitary standard

3D mold base standard library

3D standard

3D standard headform

3-D standard kε model

3D standard parts

3D Standard Parts Libraries

3-D standard κ-ε model

3-dimension standard

3G standard

4% Standard milk

4πβ(PC)-γ coincidence standard device

76 standard resolution

800 meter standard reaching