苹果彩票
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备注：a. QJ23A型仪器系惠斯登电桥线路，具有内附指零仪和电池盒，整个测量机构装在金属外壳内，轻巧且便⌒ 于携带。用来测量1-10MΩ范围内的直流电阻。适宜在实验室及现场使用。b. 内附指零仪：电流常数：< 6×10-7A/mm 阻尼时间：4s以内
