A gas discharge lamp is a type of lighting device that produces light by passing an electric current through a gas or vapor. This process, known as gas discharge, converts electrical energy into visible light. There are different types of gas discharges, with glow discharge and arc discharge being the most common. Glow discharge is typically used in applications like neon signs and indicator lights, where low power and steady light are required. On the other hand, arc discharge generates much brighter light and is widely used in high-output lighting systems. Examples of lamps that use arc discharge include fluorescent lamps, high-pressure mercury lamps, sodium vapor lamps, and metal halide lamps. These types of lamps are popular for their efficiency, long lifespan, and ability to produce bright, consistent illumination. Whether it's for street lighting, industrial settings, or general indoor use, gas discharge lamps remain a key technology in modern lighting solutions.
The roles of the shoulder are:
(1) Prevent the ballast from scattering under the subgrade to maintain the integrity of the ballast bed;
(2) Prevent subgrade soil from squeezing to both sides under load and strengthen the stability of subgrade
(3) Provide space for setting line signs and signal signs on both sides of the line;
It is used for railway staff to walk, avoid vehicles, and store materials, machines, tools, etc. on the upper part of the line for road maintenance.
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