The stability of dam abutment should has a direct relation to failure-freeoperation and security of projects, and security of downstream people's life and property as well.
坝肩岩体的稳定与否，将直接关系到工程的正常运行和安全，以及下游人民生命财产的安全。
2
Their electronically commutated brushless DC motor provides virtually maintenance-freeoperation over time by eliminating brush maintenance and associated brush motor failure.
其电子换向直流无刷电机通过排除刷子维护和关联电机的出错，在操作过程中提供免维护操作。
3
Stack gas energy restored interlock set plays an important role in FCCU in oil refinery. Long and failurefreeoperation of it can ensure the safety run of FCCU.