| 摘要 |
A locking mechanism for a pair of hopper doors which are laterally spaced side-by-side transversely of a railroad hopper car. A specially designed locking pawl is provided for retaining the cams in interlocked relation with the hooks of the locking mechanism. The pawl is so designed that a single operator standing by the side of a hopper car, can operate both hopper doors which are mounted together for unitary rotation.
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