The calculating formulas of reliability and of mean work time of the system with two work norms are worked out in the various periods of heavy repair.
并给出了在不同大修限内两个工作指标的复杂可修系统的系统可靠度及其平均工作时间的计算公式。
Boys are frequently pulled out of school to hunt, work in the fields and pastures, or help repair flood damaged walls.
男孩们不断地被拉出学校去捕猎，在田地和牧场工作，或者帮忙修补洪水损坏的墙。
Repair measures of large reducer with housing cracking are introduced by examples. Analysis is carried out on weldability. Detailed description is done on repair welding technology.
结合实例介绍了箱体断裂的大型减速机的修复措施。对可焊性进行了分析；对补焊工艺作了详细说明。
Test and analysis are carried out on the vibration trouble of flue gas fan units. The conclusion is obtained and the repair suggestion is put forward.
对烟机机组振动故障进行了测试分析，得出了结论及维修建议。
Test and analysis are carried out on the vibration trouble of flue gas fan units. The conclusion is obtained and the repair suggestion is put forward.
对烟机机组振动故障进行了测试分析，得出了结论及维修建议。
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