switch point rail是什么意思

网络释义

1)switch point rail,辙尖钢轨2)switch blade,尖轨,辙尖3)switch rail,辙尖轨4)point rail ,switch rail,转辙轨，辙尖轨5)rail and frog,钢轨与辙叉6)movable point frog,活动轨尖辙叉