Who invented the miner's safety-lamp?

সাধারণ বিজ্ঞান Basic Information of Daily Science, Inventions and... 07 Oct, 2020

প্রশ্ন Who invented the miner's safety-lamp?

  • ক.
    Thomas Savery
  • খ.
    Sir Frank Whittle
  • গ.
    Sir Thomas Malory
  • ঘ.
    Alexander Graham Bell

সঠিক উত্তর

Sir Frank Whittle

মন্তব্য

There are no comments yet.
Authentication required

You must log in to post an answer.

Log in