standard test frequency

例句：

1. 1.The standard test frequency for this product is 500 cycles per minute.
   该产品的标准测试频率为每分钟500次。
2. 2. The standard test frequency for the device is 100Hz.
   该设备的标凈测试频率为100Hz。
3. 3. The standard test frequency for the system is 100ms.
   系统的标凈测试频率为100ms。