| 摘要 |
A cartridge casing comprises a casing tube 32 having a first end and a head cap 36. The casing tube 32 bounds at least part of the head cap 36 entered into its first end. The head cap 36 is fixed relative to the casing tube 32 by a laser welding process around an internal circumference of the casing tube 32 at an interface between the casing tube 32 and head cap 36. |
