当负荷发生变化时，可以通过固体通量分析来改变操作条件，以保证二沉池正常运行。
The analysis of solid flux could be used to change the operation condition when the loading rate was changed so as to ensure the normal running of the secondary sedimentation tank.
如电网需求开始超过供应负荷，电网将降到正常操作频率以下——英制50赫兹或美制60赫兹。
When demand on the grid begins to exceed supply, the grid drops below its normal operating frequency – 50 Hz in the UK, 60 Hz in the US.
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