common crossing

Tanımlar (İngilizce)

1. isim Used other than figuratively or idiomatically: see common, crossing.
2. isim The part of a railway switch or turnout where the running-rails cross; a frog.

   “The frogs are made of steel rails; for all common crossings a check rail is placed on each side, at least 12 feet in length, and much longer in special cases. The narrowest part of the throat of the frog is 1¾ inches wide.”