| 摘要 |
The invention refers to a method for the production of a metal mining plug with grooves applied to the exterior thereof. In order to achieve an easy and simple manufacture of the metal mining plug and to achieve at the same time a long durability of the metal mining plug when being used in rock mass, a metal mining plug is formed of a flat material which is provided with grooves and which is formed to a tube by means of cold rolling. |
