オペレーションリサーチだった
operēshonrisāchidatta
1. Operation research was.
Noun
#2963595
1. Operation research was.
1. If/when operations research…; If operations research were…
1. operation
1. research
1. operation
1. Research; Of research
1. research with; by researching
1. In operation; With operation
1. Operation.; It is an operation.
1. Operational; Of operation