The problems you mentioned are part of the body design (the design is divided into chassis, body, and electrical appliances). Let me understand the situation and give you some suggestions.
You mentioned these problems, that is the body part of the design (design sub-chassis, body, electrical appliances), I'll take a look at the situation and give you some of my advice.
The problems you mentioned are designed for the body part (chassis, body and electrical appliances). I'll take a look at the situation and give you some suggestions<br>