Any machines, equipment, and fixtures not covered above should be in safe operating condition.
凡上文没有提及的其它机器、设备和各种固定装置，操作状态均须安全。
Electrical insulation of welding machines shall be tested and certified to be in safe operating condition before machine is used.
在使用电焊机之前，要对焊机的绝缘进行测试和签定，确保其能在安全的条件下进行操作。
To realize safe, high efficient, economic operation of power grid, it is important to detect three phase electrical parameter and real-time monitor operating condition of power grid.
检测三相电力参数、实时监控电网运行状态对实现电网安全、高效、经济运行非常重要。
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