First, make sure the driver's seat is at a 90-degree angle-not tipped back-to prevent your head from tilting forward, and that both you and your passenger have plenty of legroom.
首先，保证驾驶座呈90度角而不是向后倾斜，以防止你的头倾斜，同时你和你的乘客也有足够的腿部空间。
2
Precision machined tilting disc and seat for tight shutoff in reverse flow direction.