判断题 Rails are susceptible to rolling contact fatigue fissures, wear, corrosion, and poor track gauge.

判断题 They carefully inspect and repair the tracks, ensuring our safe journey with their hard work.

判断题 Bridge and tunnel workers are the woodpeckers of tunnels and bridges.

判断题 Railway track workers are called the primary doctors of the railway line.

判断题 Flaw detection workers are known as the ultrasound doctors of the railway.

判断题 The railway maintenance section is a grassroots unit of the railway.

判断题 It consists of the subgrade body, subgrade drainage facilities, and protective reinforcement structures.

判断题 Subgrade construction emphasizes drainage functions to maintain the dryness, solidity, and stability of the subgrade.

判断题 The subgrade is the foundation of the track and a crucial part of the railway line.