维修性试验中要进行维修作业，每次维修算一个样本。
Maintenance takes place in the maintainability test, and a maintenance is one test sample.
不得在作业时调整或维修机构及电气设备。
Forbid to adjust or repair the mechanism and electrical equipments during the operation.
第二类问题为具有预防性维修的模糊柔性作业车间调度问题。
The second problem is the fuzzy flexible job shop scheduling problem with preventive maintenance.
单轴筛运动轨迹为圆，该筛结构简单、维修方便、作业可靠。
Circular movement, high efficiency, simple in structure, easy to repair and reliable performance.
单轴筛运动轨迹为圆，该筛结构简单、维修方便、作业可靠。
Circular movement, high efficiency, simple in structure, easy to repair and reliable performance.
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