为给自由涡轮转速装置的定检提供参考，设计了微型自由涡轮转速测试仪。
In order to offer reference for periodic check of free turbine, the minitype Rev testing meter of free turbine was designed.
为给自由涡轮转速装置的定检提供参考，设计了微型自由涡轮转速测试仪。
In order to offer reference for periodic check of free turbine, the minitype Rev testing meter of free turbine was designed.
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