floor ventilation是什么意思

用法例句

Four technical methods of manufacturing ventilation channel plate for electric machine and their prospects are analyzed,so that the design is more reasonable and manufacturing level is improved.

分析电机通风槽板制造的4种工艺方法及各种工艺的发展前景 ,使通风槽板的设计更为合理 ,提高电机制造水平。