What is the effect on circumference of the pipe end after induction annealing? And what is the power consumption criteria with different induction coil sizes?

 So I'll answer the latter one first, because the former question wasn't too clear to me. Induction heating coils typically, as we talked about, produce this magnetic field. The stronger magnetic field is closer to the copper coil. So the more close you are to the copper coil, the stronger that magnetic field. So if you're heating a metal pipe, for example, the induction heating coil should be very tight to the metal pipe to get the most of the strongest field to interact with it. If for some reason you're not allowed to have a very tight coil, then practical limitations come in the way, and you have to live with what's the closest you can get. But typically, in the design process, we want to design with the induction heating coil as close as humanly possible for the process for the heating. So the growth question, maybe you can send us more detail as to some pictures or some more data so we can answer that offline.