| 摘要 |
The front face of an Association of American Railroads (A.A.R.) type E coupler knuckle, forward of the knuckle pivot center when the knuckle is in closed position, is formed of intersecting surfaces, one of which slopes rearwardly at an angle of approximately 12 DEG with the other surface and intersects the other surface at a location between the longitudinal axis of the coupler and a line parallel to that axis through the pivot pin hole, thereby ensuring complete closing and locking of the mating knuckles of couplers approaching under maximum angling conditions.
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