首页/ 题库 / [单选题]矿用防爆标志符号“d”为()设备。的答案

矿用防爆标志符号“d”为()设备。

单选题
2022-03-02 12:18
A、增安型
B、隔爆型
C、本质安全型
D、充砂型
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正确答案
B

试题解析

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