西德联邦铁路约使用18,000辆客车,5,800台大型机车,每辆客车每星期做一次外部清洗,机车外部清洗是根据周转计划和机车的脏污程度进行,每两星期最多一个月进行一次彻底洗刷。供车辆和机车外 The West Federal Railway uses approximately 18,000 buses and 5,800 large locomotives. Each bus undergoes external cleaning once a week. Exterior locomotive cleaning is based on turnaround schedules and the degree of dirtiness of the locomotive, with a thorough scrubbing every two weeks up to a month . For vehicles and locomotives outside