实际使用证明，改进后轴承的寿命大幅度提高。
It is proved through practice that the lifespan of the improved bearings has been greatly raised.
经实际使用证明，该系统成本低，功能全，安全可靠。
The practice showed that the system had low cost, full function and it was safe and reliable.
实际使用证明该软件对可拆式螺旋板换热器的基本设计是有效和可靠的。
The actual service proves that this CAD software about DSHE is convenient, effective and reliable.
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