用差动放大器对轴承式检流计进行改造，使之具有灵敏度高、不易损坏、可直立放置等优点。

A bearing galvanometer is modified using a differential amplifier. It has the advantage of high sensitivity and is less likely to damage and able to be put upright.

youdao

用差动放大器对轴承式检流计进行改造，使之具有灵敏度高、不易损坏、可直立放置等优点。

A bearing galvanometer is modified using a differential amplifier. It has the advantage of high sensitivity and is less likely to damage and able to be put upright.

youdao