| • द्वैध तार संचार | |
| duplex: दुमंजिला घर | |
| telegraphy: तारसंचार | |
duplex telegraphy मीनिंग इन हिंदी
duplex telegraphy उदाहरण वाक्य
उदाहरण वाक्य
- He was president of Franklin Telegraph Co ., from 1869 to 1871, during which time he invented the first practical system of duplex telegraphy which was successfully applied to the English, French and Belgian lines.