The scientific research of mechanical engineering includes several sub-disciplines. What is the relationship between disciplines?

1. The scientific research of mechanical engineering includes mechanics and mechanical manufacturing.

Mechanics: the basic technical science that synthesizes the functions of machinery, quantitatively describes and controls its performance.

Mechanical manufacturing: the science of studying mechanical manufacturing systems and processes.

2. Design and manufacturing are two inseparable entities, design is the core and manufacturing is the foundation, and both are indispensable. On the contrary, we can design "advanced inferior products" with advanced design technology, or produce "backward high-quality products" with advanced manufacturing technology, and we can't neglect both.