Later apparatus, such as Pettersson's bifilar current-meter or his more recent electric-photographic apparatus, and Nansen and Ekman's propeller current-meter, measure both the direction and the velocity at any moderate depth from an anchored vessel.
bifilar הגייה עם משמעויות, מילים נרדפות, הפכים, תרגומים, משפטים ועוד