operating in all weathers operating
present operating cost and annual operating cost
flow guide combination of depressed plate and guide piers
guide blade [= guide bucket
Guide blade of rear guide impeller
zero capital of operating
128-bit operating systems
16-bit operating system
1st grade clean operating room
32-bit operating systems
64-Bit Operating Systems
abdominal operating instruments set
abnormal operating cash flow
abnormal operating condition
Abnormal Operating State
abnormal operating transient
accident operating condition
accident operating conditions