the first problem is that the program cannot be pasted. There is a problem with the knife with shavings when drilling. Find a double-edged compound knife and better pour a little fillet. Use the counter spiral hollow knife to walk slowly and quickly. When the knife is fed and retreated, there are shavings when the protective peritoneum is brought up. Look, you should just learn to return it. Think slowly and understand the coordinate values. Basically, it can be said that half of the success…