The production practice has proven that the design is reasonable, the operation is stable and the service l…
经生产检验设计合理，操作稳定，合成炉使用寿命长。
Good reliability of the control system has been proven in practice.
工程实践证明该控制系统具有良好的可靠性。
It has been proven by practice that the excavator operated satisfactorily after engine replacement.
实践证明，换装发动机后挖掘机的使用效果良好。
The process has proven itself to be successful in mill practice.
这个工艺过程被一些厂家证实是一种有效的方法。
The practice of each country has been proven enough.
各国的实践已充分证明。
The practice of each country has been proven enough.
各国的实践已充分证明。
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