Russian military tech in WW1?

Question

Did they invent any new technology? And who was the lader for them at the beginning and end of the war?

Answer 1

Equipment roughly on par with rest of Europe at start of war, but troops poorly trained and Officer corps mostly by station of birth and political appointments.
Russia wasn't in war that long: they withdrew because of the communist revelation starting at the same period of time which overthrew the Czar and heralded the start of communist rule in Russia.

Answer 2

ni4evo ne pridumali