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.
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。
3
Their electronically commutated brushless DC motor provides virtually maintenance-freeoperation over time by eliminating brush maintenance and associated brush motor failure.