Double Stacked

Some articles on double:

Freight Rail Transport - Containerization - Double-stack Containerization
... But if the rail line has been built with sufficient vertical clearance, a double-stack car can accept a container and still leave enough clearance for another ... This usually precludes operation of double-stacked wagons on lines with overhead electric wiring ... wiring from the start, has been built with tunnels that do accommodate double-stacked wagons so as to keep the option to economically rebuild the route for double stacking in ...

Famous quotes containing the word double:

    since I see
    Your double heart,
    Farewell my part!
    Sir Thomas Wyatt (1503?–1542)