有时，设备的失灵是因为尽管设计是好的，但却不当地使用低质量的材料来进行生产。
Sometimes devices fail because a good design is constructed with low-quality materials incompetently applied.
分析了扇形和偏心圆两种平衡轴设计的要求以及平衡重低质量的设计原则。
In this paper the demands, the lowest mass design principle of balancer shaft of fan type and eccentric circle type balancer mass are analyzed.
由于技术进步和设计需要，航天应用中不可避免地会遇到选用低质量等级塑封器件的情况。
During the technological development and design, it is inevitable that one has to use some available components not very reliable for space applications.
应用推荐