| 摘要 |
The end face 18 of a butt end portion 14 of coupler shank 12 includes a vertical recess 19. The recess is defined by two angled side walls 20,22 and a rear wall 24. A follower block 50 includes a vertically extending so projection 62 in its face adjacent the coupler butt end portion, such projection having two angled side walls 64,66 and a front face 68. The projection 62 co-operates with the recess 19 to limit relative horizontal movement of the shank 12. <IMAGE> |
