The system has got satisfactory effect through long term operation.
该系统经长期运行，获得满意效果。
However long term operation of the center depends on local support.
但是，中心长期的运作必须依靠本地社区的支持。
Long term operation shows that it is reliable and stable.
经长期使用，证明性能可靠、工作稳定。
Effective measures were presented in respect of design, operation and equipment to ensure long-term operation.
同时提出从设计、操作、设备等方面采取有效措施，保障预热器的长周期高效运行。
Effective measures were presented in respect of design, operation and equipment to ensure long-term operation.
同时提出从设计、操作、设备等方面采取有效措施，保障预热器的长周期高效运行。
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