Which is better, milling machine, spark machine, locksmith or numerical control?

Locksmiths are not popular now, there is less work that can be done by hand, and it is ok to learn to open molds! What matters is how to use the equipment! Turning, milling, planing, grinding and drilling can be done, and it is best to understand wire cutting and numerical control programming! Follow-up: what is the opening of the mold? I'm making a milling machine now and a spark machine next month. Answer: Make a mold question: The fitter is to install the mold and assemble the mold. Answer: There is also a question about designing and manufacturing molds: That's a designer, so what should I do now? Answer: Buy some books and study more. Q: The book is full of theoretical knowledge. I want to practice my work. Which salary is higher? Answer: It is good to combine theory with practice. Q: A relative taught me the Mars machine, and I can learn it in a week. I want to assemble molds. Those masters don't teach well, and they can't learn anything for half a year. So I don't know what to do. My job is easy now. I have no night shift. I have to work the night shift when I get to the spark machine Answer: Yes, those who know how to mold just refuse to teach, for fear that if you learn to rob him of food, you may learn CNC. You can find a training class to learn! Follow-up: you can't learn knowledge in the training class, and it's useless to learn it. Answer: Read it and ask yourself: Do you understand? Don't talk nonsense if you don't understand, big brother. What I want is advice. Answer: I am a locksmith myself, and I know what I want now. Q: What should I do? The fitter has time to go to work, but not after work. Sometimes I have to leave work in the middle of the night. At present, it's very easy. I just want to learn more skills. The Mars machine is for teaching.