一ひとつ目め滑かっ車しゃ

noun

bull's-eye (pulley block)

A pulley block with a single sheave (wheel). Used in rigging and mechanical contexts.

• 一ひとつ目め滑かっ車しゃを使つかってロープの向むきを変かえた。

  We changed the direction of the rope using a single-sheave pulley block.