| 摘要 |
<p>The tongues (2) are detachable from control rails, each being secured at one side by a wedge (5) bearing against it in the transverse direction. On the other side, a supporting body (6) with an inclined face (7) fits over it. This face is inclined at an angle (α) to the plane of the track which is less than that (β) of the face bearing against the wedge on the body. There can be bosses on the tongue underside, forming stops limiting lengthwise sliding movement of the tongue and engaging in recesses (17) in the body.</p> |
