They system should be tested under operating condition.

这个系统要在运转情况下试验。

Examine the operating condition of driving part regularly.

定期检查各传动部位的运行情况。

Please check whether the equipments are in proper operating condition.

请检查一下设备运行情况是否正常。

The protection devices have been tested under operating condition and found in trouble.

保护装置在运行状态下试验过，发现有故障。

It is always a problem for beginners to tune a regen radio into correct operating condition.

它始终是一个问题，对于初学者一再生调整到正确的电台操作条件。