inertial [reference] frame， inertial [reference] system

optical reference filter wavelength standard reference material

ratio of diameter of labyrinth passage to diameter of particle

(thermo) reference material

137Cs reference inventory

3D forward looking reference map

3D reference system

5 reference

95% reference range

ABC REFERENCE FRAME

absolute cell reference

absolute reference

absolute reference frame

academic reference

acoustic reference

Acoustics--Reference

action frame of reference

action reference

action reference variable