Wrong point of view! Thank you, friends upstairs! It is very troublesome to correct tooth decay now. The hole is too big. Unless the mold is opened, it is difficult to correct it manually! Now when we process, the holes on the flange surface and the cavity are processed separately, because their benchmarks are different! The fixture is supported by the lower surface of the flange surface, pressed by the upper surface of the flange surface and positioned by the shape of the cavity! Such a large cavity, the wall thickness is thin and the deformation is great! The customer's drawings are based on the surface of the cavity, not the hole processed! So the location is difficult to reach.