submarine telegraphy वाक्य
"submarine telegraphy" हिंदी में submarine telegraphy in a sentenceउदाहरण वाक्य
- This was a design that would help revolutionise submarine telegraphy and the future of telephone submarine systems.
- He had entered the service of Messrs . Liddell and Gordon who were engaged in the new work of submarine telegraphy, which satisfied his aspirations, and promised him a successful career.