return air中文什么意思

例句与用法

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1. Fast driving method of west main return air roadway in shihe mine
   寺河矿井西总回风大巷快速施工法
2. Delivery and return air temperature
   送风及回风温度
3. Standard return air passage
   标准来回航空旅费
4. If you don t want to include the one - way return air ticket , you can deduct 65
   如选择不含单程机票，团费可扣除65 。
5. Problems and its solution of main return air system of beiminghe iron mine
   北氵名河铁矿主回风系统存在问题及解决措施