Debt service coverage ratio
Debt service coverage ratio (DSCR)
ratio of not-in-service operations
Service life and ratio of material utilization
Self-service service terminal
single-plane (through-plane service) service
Break of Service， Out-of-Service
free medical service; free medicare; public health service
in service and out of service
overland common point service {= OCP service}
search and rescue service {= SAR service}
service oriented architecture service
Value Added Service (VAS)New Service
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)