焦炉出炉煤气设备主要作用是导出和()从炭化室出来的荒煤气,并使煤气流向冷凝工序。
参考答案:冷却
无压隧洞虽不能承受较大的内水压力,但水流充满了整个断面。
Logistics is about the () flow, like the movement of materials, goods, cargo and freight.
A.article
B.products
C.service
D.equipment