Maintenance and operation of that maintenance, in service of machinery, equipment maintenance, inspection, repair operation.
维修性操作即维修，对在役机械、设备进行维修、检查、修理的操作。
Maintenance and operation of that maintenance, in service of machinery, equipment maintenance, inspection, repair operation.
维修性操作即维修，对在役机械、设备进行维修、检查、修理的操作。
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