当电池容量大时，其内电阻小，不同类型电压表测得开路电压值的误差就小。
When the battery capacity is large, its internal resistance is small and the error is small for the values measured by different models of voltmeter.
ECG——6511是医院常见的便携式单导心电图机，其具有抗干扰性能好、操作方便、蓄电池容量大等优点。
ECG-6511 is a familiar single-lead protable electrocardiograph in the hospital. It has high anti-interference quality, It will lost the protable function.
ECG——6511是医院常见的便携式单导心电图机，其具有抗干扰性能好、操作方便、蓄电池容量大等优点。
ECG-6511 is a familiar single-lead protable electrocardiograph in the hospital. It has high anti-interference quality, It will lost the protable function.
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