China Sabin Master Reference

crystal reference gauge

master reference line

reference gauge

synchronized master reference

depth master gauge

master gauge

Multifunctional master gauge

inertial [reference] frame， inertial [reference] system

optical reference filter wavelength standard reference material

Bayard-Alpert ionization gauge (B-A gauge)

Brown and Sharpe wire gauge {= B&S wire gauge}

track gauge level gauge

(thermo) reference material

137Cs reference inventory

3D forward looking reference map

3D reference system

5 reference

95% reference range