axial compression ratio and slenderness ratio

(DR)damage ratio

(the ratio of )volumetric strain

(the ratio of)shear strain

~(99m)Tc and ~(99)Mo intensity ratio

a ratio of height to thick

A TP ratio

AA utilize ratio

abnormal ratio

abnormality ratio

abortion ratio

aboundance ratio

Abrasion Degree Growth Ratio

Abrasion Ratio

abrasive ratio

absolute advance ratio

Absolute Concentration Ratio

absolute performance ratio

absorb ratio

Absorbance ratio