These test instruments are designed in such a way that there is no risk of unintentional ignition when they are used . 這些測量儀表的構造保證它們在使用時不存在早爆問題。
The circuit tester is a simple test instrument which only shows whether the circuit is intact or whether there is a break . 電路導通器是一種簡單的量測儀表,它只能檢查電路的通斷狀況。
Research on reliability test instrument of step motor 步進電機可靠性測試儀的研制
Multi - function electronics power parameter test instrument 多功能電力參數測試儀
An electro - motor rotor dynamic balance - testing instrument 一種電動機轉子動平衡測試儀