How to arrange the profiled steel plate of PKPM multilayer steel frame structure
A physical quantity to meet the conditions, which is equivalent to the stagnation point in Mathematics
The critical value is when an object changes from one physical state to another
Therefore, it is an important method to solve the maximum value in physics by solving the maximum and minimum values of the physical quantity by the critical state. Some people think that the use of critical state to solve the most value should be cautious, we must first distinguish the relationship between the two states
