摘要:
A method for the manufacture of hollow metal spheres is provided. The method includes stamping appropriately-shaped hemispherical components and subsequently laser welding of the hemispheres. Metal spheres made by the method of the invention are substantially uniformly symmetrical in their mass distribution, and can provide superior performance in applications, such as golf ball cores and light-weight ball bearings.
摘要:
Gas Projection Device that can take many external forms that simulate military munitions being exploded and that contain features that enhance the sound of the explosion and the appearance of smoke and attendant percussion. Such device can be controlled by many different means including electronic remote control.
摘要:
Gas Projection Device that can take many external forms that simulate military munitions being exploded and that contain features that enhance the sound of the explosion and the appearance of smoke and attendant percussion. Such device can be controlled by many different means including electronic remote control.