"I stayed on because I was concerned about the roof and hanging lights and ventilation systems," he said.
“我留在火车里面，因为我担心车道的顶部和悬挂的灯会掉下来以及通风系统可能有问题，”他说。
2
Provide adequate ventilation, particularly in roof areas where hydrogen might collect. Forced ventilation may be necessary in some applications.
提供充分的通风，特别是氢容易积聚的屋顶区域。某些应用中强制通风是必要的。
3
The generous petal roof brings natural daylight deep into the open-air, multiple-plane retail arcade and induces air flow current for natural ventilation.