Hindi block signal का अर्थ हिंदी में

• ब्लॉक सिगनल

English block signal meaning in English  •  block signal का अर्थ अंग्रेजी में

• One of the danger signals or safety signals which guide the movement of trains in a block system. The signal is often so coupled with a switch that act of opening or closing the switch operates the signal also.