psi non profit The one solution they have come up with to aid arouse auto system and to assist visitors to spend some money is always to request more loans and borrow millions if not trillions of dollars. Numerous people feel that this can be a method which may work. While others are worried since it will press the nation farther into debt. This makes us ask the question of, "When is it to certainly ask for money." The current GB/T3730.1-2001 car is divided into passenger cars and commercial vehicles. From the end of the 19th century to the early 20th century, car designers focused their energies on the development and innovation of mechanical engineering. First half of the 20th century, all about the basic structure of the car has been invented, automotive designers begin from the outside to improve on modelling, and successively introduced the aerodynamics, fluid mechanics, human body engineering and industrial modelling design (industrial aesthetics), etc With the development of social division of labor and market economy, the concept of market is also developing and deepening, and the multiple meanings of different levels are reflected in the deepening of the project. The current GB/T3730.1-2001 car is divided into passenger cars and commercial vehicles.