The whole system is simple, steady, economical, convenient to operate and have strong practicability.
系统控制简捷、稳定，调节方便，节约能耗， 重复性好，实用性强。
One technology must have its practicability to become real after its rationality and inevitability.
一项技术具有合理性、必然性之后，还必须具有现实性才能变成现实。
One technology must have its practicability to become real after its rationality and inevitability.
一项技术具有合理性、必然性之后，还必须具有现实性才能变成现实。
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