The internal fracture was found to be inadequate for 20 CrMnmo exercise injuries, which were tested at a high and low value.

The main processes in the GCr15 bearing steel tubes are the contour of the heated duct, thermal piercing, the spherical retreat, acid lubrication, cold-deeping, the retreating, the correction, etc.

The cymbal GCr15 (Snote: round rod) in the unprotected turbo-cooking turbo-fired turbo-fired turbo-clattering and causing cracks in the surface of cold-drived platitudes.