knife switch वाक्य

उदाहरण वाक्य

1. Power was connected by closing simple knife switches and the system was shut down ( the electrical circuit " opened " ) by a worker garbing a connecting line at the power pole and pulling it out of the arc-light style plug mounted on the pole ( a sometime dangerous maneuver that produced 6 to 8 foot ( 1.83-m to 2.44-m ) long high voltage arcs ).