经常保皇
who often votes with the Government
正常保养周期
regular maintenance interval
保养计划调整
maintenance schedule adjustment
每半年的保养计划表
semiannual maintenance schedule
润滑和预防性保养计划
lubrication and preventive maintenance schedule
推荐的保养计划表
recommended maintenance schedule
有效的预防性保养计划
effective preventive maintenance program
设计计画预算制度
planning-programming-budgeting system (PPBS