What are the current problems faced by precision parts processing?

Precision parts are processed with high precision, such as how much the diameter of the cylinder should be set. If it is set incorrectly, will there be a big problem? The editor clearly tells you that if there is a problem with these details, it will be troublesome in the later period. It is very large. This will cause damage to some devices. This is the worst point, but the difference should not be too large, as long as it is within the control range. There are also specific and strict requirements for length, width and height, and the positive and negative errors are the same There are regulations, such as a built-in cylinder (take the simplest basic component as an example). If the diameter is too large and exceeds the error tolerance, it will cause the situation that it cannot be inserted. If the actual diameter is too small, the error will be exceeded. If the lower limit of the negative value is allowed, the insertion will be too loose and the problem of looseness will occur. If such a problem occurs, it needs to be processed again.