During normal flight operations, there are several situations that can lead to the smell of gasoline in the cabin.

The development process of my country's hydraulic (including hydraulic, the same below), pneumatic and sealing parts industry can be roughly divided into three stages.

Seals​ are parts that prevent the leakage of internal substances in mechanical equipment and the intrusion of external impurities into the interior. They are widely used in the industrial field and are indispensable. The performance of seals directly affects the performance of mechanical equipment.