| 摘要 |
An opening cover of fiberglass is provided for hopper railroad cars, whereby the car may be loaded from above by causing the halves of the cover to move outward through a cable drive system. The covers are of an aero-dynamic shape which provides for negative lift and drag. By employing light-weight materials and an aero-dynamic shape, substantial advantages in fuel cost and consumption can be achieved, while providing for easy loading and protection of cargo through the translational movement of the cover halves.
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