carbon arc उदाहरण वाक्य

उदाहरण वाक्य

1. In 1885, Nikolay Benardos and StanisB
   aw Olszewski developed carbon arc welding, obtaining American patents from 1887 showing a rudimentary electrode holder.
2. Carbon arc lamps were started by making contact between two carbon electrodes, which were then separated to within a narrow gap.
3. Therefore, O'Brien, as a physicist on staff, developed a carbon arcs with cored carbons that very closely matched the solar spectrum.
4. Unlike single-carbon arc welding, in "'twin-carbon arc welding "'the arc is maintained between two carbon electrodes held in a special holder.
5. The sidewalls have the original gold embossed paneling and the projectors, which were added around 1943, are of the carbon arc variety.
6. In the same year an iron heated by a carbon arc was introduced in France, but was too dangerous to be successful.
7. These larger ones use a carbon arc lamp as their light source, with a diameter of 20 inches ( 50 cm ).
8. Secondly, although the carbon arc lamp was bright, and relatively economical for the illumination produced, individual lamps were expensive and complicated, although powerful.
9. In the 1980s and as carbon arc lamps fell into decreasing use, the spotlight began to employ a high-intensity xenon lamp as its light source.
10. Xenon, mercury, metal halide or carbon arc lamps have to be used with a careful elimination of shorter wavelenghs usually by adding a borosilicate filter.