Its failure-free operation has great impact on the security and economy of the boiler. 它的正常运行直接影响锅炉的安全和经济性。
The laws and regulations adaptable each other of formulation together with professional basketball is guarantied the failure-free operation in profession way. 制定与职业化篮球相适应的法规政策,保证职业化道路的正常运行。
Tractor is a repairable system and its time of failure-free operation forms a random pro-cess. 拖拉机是一个可修复系统,其无故障工作时间构成了一个随机过程。