K-rail

短语

词形变化

K-rails 复数 K-rails

释义与例句

n.
  1. 1.

    A concrete barrier used to separate lanes of traffic.

词源

This term is stipulated in a specification of the California Department of Transportation, who first started using concrete median barriers in the mid-1940s. The reason for the letter K is uncertain.

来源：wiktionary