Junction Box， Connection Box， Connector Box
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
box-girder and box-pier