平ひら歯は車ぐるま

noun

spur gear

A gear with straight teeth parallel to the axis, used to transmit motion between parallel shafts. Technical term in mechanical engineering.

• 平ひら歯は車ぐるまは、平へい行こうな軸じくの間あいだで動どう力りょくを伝つたえるために使つかわれる。

  Spur gears are used to transmit power between parallel shafts.