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Half Tone Engraving MCQ (Multiple Choice Questions) PDF Download
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The MCQ: In which one of the following year, half tone engraving was patented; "Half Tone Engraving" App Download [Free] with answers: 1806, 1857, 1869, and 1813 for online elementary school classes. Solve Inventions and Inventors Quiz Questions, download Google eBook (Free Sample) for school certificate.
Half Tone Engraving Questions and Answers PDF Download
In which one of the following year, half tone engraving was patented?
- 1806
- 1857
- 1869
- 1813
Halftone engraving was patented by
- Sir Nikola Tesla
- Sir Desbarats
- Sir William Augustus Legge
- both b and c
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Half Tone Engraving MCQs Book Questions
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