| 摘要 |
Hollow body is closed at one end and is formed from a blank by a die, whose floor is closed, acting against a moving stamp which is surrounded without play by a guide on whose front surface the front surface of the hollow body lies during the return motion of the stamp. The support surface for the body's front surface is a surface in the annular space of the guide; its outer diameter is slightly greater than that of the body. |
