同义词
1)time,preventive maintenance,预防性维护时间2)preventive maintenance schedule,预防性维护时间表3)preventive maintenance time,预防维护时间4)preventive maintenance time,预防性维修时间5)A administrative preventive maintenance time,维护准备时间;管理预防维护时间6)administrative preventive maintenance time,管理预防维护时间
