发生。 中文名称：一级保养 英文名称：first level service 解 释：以操作工人为主，由维修工人辅助，按计划对设备进行的定期维 护。其内容为：对设备进行局部拆卸、检查、清洗；疏通油路，更换不 合格的毡垫、油线；调整各配合间隙；
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first level service
一级服务
以上为机器翻译结果，长、整句建议使用 人工翻译 。
The first minister said the franchise will build on the existing level of service and will allow new services to be incorporated as and when they are developed.
BBC: Photo of Scottish flag
First said it hoped to be able to run a similar or better level of service than that during the October strike.
BBC: First Bus staff to strike in Cornwall and Devon
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