【运输】连结操作装置，手工操作【运输】（火车）挂钩的操纵装置

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

operating post

operating mechanism

non-operating holding company【金融】

multiple processor operating system【计】;multiprocessor operating system【计】

non-operating item

ophthalmic operating instrumentsset

operating supervisor【计】;operation supervisor【计】