Inventions Practice Tests
Inventions Online Tests
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The MCQ: Escalator was discovered by; "Escalator" App Download (Free) with answers sir jesse reno, sir henry w. seelay, sir schuyler skaats wheeler and sir samuel w. francis for online learning. Solve inventions and inventors quiz questions, download Google eBook (Free Sample) for online study.
MCQ 1: Escalator was discovered by
MCQ 2: In which one of the following year, escalator was patented?
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