Concrete Sleeper

A concrete sleeper is a railroad tie made out of steel reinforced concrete.

Read more about Concrete Sleeper:  History, Types, Advantages, Under Sleeper Pads, Disadvantages, Alternatives, Manufacture, Transport, Installation, Oldest, Turnouts, Problems, Inventors

Famous quotes containing the word concrete:

    “Experience and imagination must enter into the very constitution of our thoughts involving concrete individuals.”
    —Zeno Vendler (b. 1921)