J0402 Demonstrating Galvanometer for Middle school(Ammeter &Voltmeter)
　　高中演示電表為指針式內(nèi)磁結(jié)構，及其測量電路等部份所組成。它具有使用方便，性能穩(wěn)定、安全可靠、演示直觀等優(yōu)點。它共有十四檔測量量程，供教學演示實驗中作檢流計，及測量直流電流、直流電壓、交流電流、交流電壓等之用。

　　The model JO402 is comprised of inner magnet ic structure and measuring Circuit. It has such excellence as easily for usage, stabriity, safety,and visual for demonstration. It provides14 measuring ranges and may serve as galvanometer or measuring instrument of DCA,DVv,ACA and ACV
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