煤矿工作水泵和备用水泵的总能力应达到能在()h内排出地下矿山24h的最大涌水量。A:20B:23C:25D:28

作者: rantiku 人气: - 评论: 0
问题 煤矿工作水泵和备用水泵的总能力应达到能在()h内排出地下矿山24h的最大涌水量。
选项 A:20 B:23 C:25 D:28
答案 A
解析

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