underrunner

发音

US

词形变化

underrunners 复数 underrunners

释义与例句

n.
  1. 1.

    The lower of a pair of grinding millstones.

  2. 2.

    An additional runner added to the bottom of a sledge to protect the main runners in harsh conditions.

  3. 3.

    A runner (mechanical part intended to guide or aid something else to move) designed to be inserted underneath the item to be moved.

词源

From under- + runner.

来源：wiktionary