An aggregate includes coke and titanium for introduction into metallurgical vessels for increasing the durability and for repairing the refractory lining. Some methods include a filler material that hardens into a flexible solid foam cushioning layer which may optionally form a bond between the socket cup and the liner, embedding the liner in the cushioning layer. Between each machining principal axis and each tool-changing positions is disposed a tool-changing arm. Low-security data is recorded as it is into the flash memory.