The cervical spine (neck) is composed of seven vertebrae. There are discs in-between the vertebrae, which act as cushions or shock absorbers between the vertebrae of the neck. Discs can become damaged either through trauma or degeneration, and cause...
Steel discs are very important. The disc acts timing device to allow the welding powder to heat to proper temperature, the disc away allowing the molten copper to a point where it would weld metal toenter the weld gravity before ignition. One Metal...
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