underrunner

名词 n.

英文释义

名词 n.
  1. The lower of a pair of grinding millstones.
    — FOR SALE AT A BARGAIN. […] Four run stones, Munson underrunners, 3 ft diameter.
  2. An additional runner added to the bottom of a sledge to protect the main runners in harsh conditions.
    — Less than half a mile to the south the party sighted an underrunner of a sledge, and assumed it to mark the location the Norwegians had assigned for 90°S.
  3. A runner (mechanical part intended to guide or aid something else to move) designed to be inserted underneath the item to be moved.
    — A triple tandem tow using underrunners. This method has been used for long ocean tows by tugs with a single-drum winch.

词形变化

underrunners plural

词源

From under- + runner.
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