الواصلة
low·ballالنطق
علم أصول الكلمات
[ 'lO-"bol ] (transitive verb.) circa 1961. American railroad term that described one of two positions of the ball of a ball signal. This is the same history for highball. 2001, Anthony J. Biancull, Trains and Technology: The American Railroad in the Nineteenth Century, ISBN 0874138035: