It is proved in use that the tools are practical with good results.
使用表明，这些工具实用效果好。
The instrument is proved by practical use to be an economical, stable and reliable instrumentation.
是一种经济实用和稳定可靠的过程溶液浓度自动测控仪器。
The feasibility and advantages of PEFM are proved by the technologic test and practical use.
通过工艺试验和实际应用验证了工艺方案的可行性和优越性。
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