| Subject | English | Russian |
| nucl.pow. | free flow in the pipeline | проходимость трубопровода (During the post-installation flushing, free flow has been confirmed in pipelines Nos. 12, 34, 56. Vasilius Galkinus) |
| O&G | free-flow pipeline | безнапорный трубопровод |
| construct. | free-surface flow pipeline | безнапорный трубопровод |