Ukraine said it destroyed one of Russia's best and most expensive fighter jets over Kursk as its military pushes further into the region.
  • Ukraine downed a Russian Su-34 fighter jet over Kursk amid an ongoing territorial push.
  • The Su-34, worth around $36 million, is Russia’s most efficient fighter bomber with advanced tech.
  • Ukraine has previously held long kill streaks with Russian Su-34s.
  • TranscendentalEmpire@lemm.eeEnglish
    6·
    1 month ago

    The bearings in trains are actually pretty complicated to build. They use slanted roller bearings, not just regular old ball bearings. 10 companies in the world make like 70% of all rail bearings, and 5 of those are in Japan. Plus, only a few countries produce the two steel alloys that you make these bearings out of.

    China does produce around 20% of the bearings used in trains, but pretty much all of it gets used for domestic purposes and they still have to import due to their massive rail expansion projects