ZJ2DJ型区间接收盒其接收灵敏度,黄继电器电压,绿继电器电压各为多少?
参考答案:
其值分别为170mV±15mV,22V±2V,22V±2V。
“四无”:无积灰、()、无松动、无油污。“六不漏”:不漏风、不漏气、不漏电、不漏水、不漏油、不漏灰。
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B. rather than
C. or rather
D. in spite of