axial compression ratio and slenderness ratio

B-C ratio (benefit-cost ratio)

benefit-cost ratio (B-C ratio)

focal ratio (=focal-length ratio)

grinding ratio(G-ratio)

maximum ratio combing according to signal to noise ratio

recirculation ratio recycle ratio

recycle ratio recirculation ratio

signal-noise ratio (=signal-to-noise ratio =SNR)

stop ratio and start ratio in time segment

price--earnings ratio;P/E ratio

3D laser passing

4 High Skin Passing Mill

a card passing

Accented passing note

air pressure pulse from two trains passing by each other

air pressure pulse in train passing

argument passing

assets of the company passing on the death