positive pressure ventilation system是什么意思 positive pressure ventilation system怎么读
positive pressure ventilation system的相关资料
positive pressure ventilation system的用法和样例
- This paper introduces the decompression ventilation technique with local fans in the excavation of the mine.
对矿井开采中采用的局部扇风机进行泄压通风的技术作了介绍。
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