【电学】执行部分【电学】起作用部分

operating account【会计】;trading account【会计】

ratio of non-operating profit to net sales【会计】

device for coupling the cylinder core and the bolt-operating member of cylinder locks

batch-processing operating system【计】

STUD(S) for securing straps for operating windows

Standard operating procedure，SOP

multiprocessing operating system【计】

operating floor