Production History – This is a historical trend used to identify abnormal changes in production rates that could affect future supply.
生产历史– 这里展示的主要是历史生产趋势，用来找出上游生产中的异常变化，以及可能对今后原油供应的影响。
AC source may not deliver current to blow the fuse in a power supply, it is not suitable for abnormal test.
交流源不会提供足以烧断电源保险丝的电流﹐因此不适合非正常测试。
The abnormal failure of battery which works as the backup power supply for DC system when ac power failure occurs, will affect the safe operations of DC system seriously.
蓄电池作为直流系统交流停电时的后备电源，其非正常失效严重影响了直流系统的安全运行。
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