What type of defect is this?, Alignment defect, Ballast fouling, Gauge deviation, Which one is the problem?, Ballast fouling, Track geometry problem, Switch blade damage, What is this problem called?, Track geometry error, Gauge deviation, Switch blade damage, Which one of it?, Ballast, Fastening system, Turnout, What risk may occur?, Signal failure, Power outage, Train derailment, What is the main purpose?, Supply electricity to trains, Change train direction, Hold the rail securely to the sleeper, What happened?, Gauge deviation, Ballast fouling, Alignment failure, Why is maintenance delayed?, Train power loss, Gauge widening, Ballast contamination

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